Testing if a relationship is a function | Functions and their graphs | Algebra II | Khan Academy
A1 A2 B1 B2 C1 C2
have
US / həv /
•UK / hæv /
- verb
- To drink, smoke, eat or use something
- To experience the effects of something
- To organize an event, or join in an activity
- To own, possess, or hold something
- To cause to happen or produce a particular effect
see
US / si: /
•UK / si /
- verb
- To go on a date with someone
- To predict whether something is, or will be true
- To understand what someone says
- To use your eyes to look at something
- To visit a place often for sightseeing or pleasure
- To visit or meet with someone
- To find out by waiting or looking
- To watch (a game, movie or TV show)
mark
US / mɑ:k /
•UK / mɑrk /
- noun
- Person's name
- A dirty spot or line on something
- Grade or score given for homework
- Line or symbol made when writing
- Particular point on a scale of measurement
- Grade, such as a student receives in school
- Stain or spot on something
- Sign or symbol of a quality of feeling
- Written sign or symbol
- verb
- To put a dirty spot or line on something
- To give a grade for homework
- To indicate something with a sign or symbol
- To make or leave a visible sign of (path, etc.)
- (Animals) to go to the toilet to show your area
- To write or draw a line on something
relation
US / rɪˈleɪʃn /
•UK / rɪˈleɪʃn /
- noun
- Connection between two or more things
- A member of your family
- Way in which two or more things are connected
accord
US / ə'kɔ:d /
•UK / əˈkɔ:rd /
- noun
- Agreement or harmony
- An agreement or treaty between countries
- verb
- To be in harmony or agreement; consent
- To give (someone) the respect due to them
negative
US / 'neɡətɪv /
•UK / ˈnɛɡətɪv /
- adjecitve
- Being harmful, unwanted or unhelpful
- In mathematics, being less than zero
- Focusing on the bad aspects; pessimistic
- noun
- The opposite to a positive electrical charge
- In grammar, containing words such as 'no' or 'not'
- Reply to a question or statement that means 'no'
- Image on camera film used to make a photo
could
US / kəd /
•UK / kʊd /
- other
- Past form of 'can' to mean have ability
- Used to ask for something politely, or to offer
next
US / nekst /
•UK / nɛkst /
- adverb
- The one that follows another in time or order
- At a time or place directly after the present one
- noun
- The one that follows after
- adjecitve
- Immediately after the previous one
- First occurrence after the present one
know
US / nəʊ /
•UK / noʊ /
- verb
- To be familiar with a person or place, thing
- To feel sure or be convinced about something
- To discover or be aware of something
- To be able to distinguish
- To have knowledge of things
with
US / wɪð /
•UK / wɪð, wɪθ /
- preposition
- As an employee of a certain company
- Against something or someone
- By using something as a means
- Due to; because of
- Including
- Possessing as a feature
- Related to
- (Of the manner/attitude by which you do something)
- Used to express that people or things are together
this
US / ðɪs /
•UK / ðɪs /
- adjecitve
- Used to indicate something already been discussed
- Used to indicate something happening around now
- adverb
- An indication by a physical motion or gesture
- A specific amount of
- determiner
- Person, thing, or idea near you
- pronoun
- Person, thing that has already been discussed
the
US / ðə /
•UK / ðə /
- article
- Used to refer to something already mentioned
- Used to show there is only one of something
- determiner
- Used to describe all of a family
below
US / bɪ'ləʊ /
•UK / bɪˈlo /
- preposition
- In a lower position, place, or level
might
US / maɪt /
•UK / maɪt /
- other
- Used to politely request an action
- Used to express that something could happen
- Power, strength, force or influence
let
US / let /
•UK / lɛt /
- verb
- To allow someone to do something
- Introducing a suggestion to do something together
- To rent a house, etc. to others
also
US / 'ɔ:lsəʊ /
•UK / ˈɔlso /
- adverb
- In addition; too; in a similar way
fair
US / feə(r) /
•UK / fɛr /
- adjecitve
- Neither very good nor very bad; average
- (Of skin) light colored; not dark
- Quite good; quite a lot
- Treating all people the same way
- (Of hair) light colored; blonde
- (Of weather) sunny; not raining
- noun
- Event for companies to show their products
- Event to sell things to help a charity
order
US / 'ɔ:də(r) /
•UK / ˈɔrdɚ /
- noun
- Religious or social group, as of nuns
- Instructions to others to do what you want
- State in which things are neat and organized
- What you ask to buy, e.g. food in restaurant
- Social or political control of an area
- verb
- To put things in a sequence, e.g. a, b, c
- To give instructions to others to do what you want
- To ask for something you want to buy, e.g. a meal
into
US / 'ɪntə /
•UK / ˈɪntu /
- preposition
- Moving or going inside something
- In the same direction as; in the direction of
- So as to become; taking the state of
one
US / wʌn /
•UK / wʌn /
- pronoun
- You; we; people in general; someone
- The thing or person previously referred to
- adjecitve
- Used to refer to people generally
- Being a strong example of (something mentioned)
- number
- Number 1
you
US / jʊ /
•UK / ju /
- pronoun
- Person someone is speaking or writing to
- Person or people in general
map
US / mæp /
•UK / mæp /
- noun
- Diagram showing the geography of an area
- verb
- To draw a diagram to show the geography of an area
- To find points of similarity between things
exclamation
US / ˌekskləˈmeɪʃn /
•UK / ˌɛkskləˈmeʃən /
- noun
- Abrupt excited utterance
once
US / wʌns /
•UK / wʌns /
- adverb
- One time; one instance
- At a time in the past
- conjunction
- When; as soon as
will
US / wɪl /
•UK / wɪl /
- noun
- Desire or choice of someone
- Document saying who gets your money when you die
- Strong desire to do something; determination
- Desire to do something; strong wish to do
- other
- Used with verbs to express the future
- verb
- To leave property to someone after your death
- To use mental effort to make something happen
- Am (is, are) likely to do
- To influence someone to do something
- To make something happen by strongly wanting it
input
US / ˈɪnpʊt /
•UK / ˈɪnˌpʊt /
- noun
- Advice or ideas that someone provides
- verb
- To put in information, advice or opinions
point
US / pɔɪnt /
•UK / pɔɪnt /
- noun
- An item to be discussed
- Small spot or dot
- Fact or detail
- Feature of something
- The size of the text on a page or screen
- A certain time or stage in a process
- Certain position in time or space
- Idea or fact you try to convince people about
- Measurement of scores in a game, sport
- Sharp end of something, e.g. a pen or pin
- verb
- To face a certain direction, e.g. north
- To indicate something with your finger to others
axis
US / ˈæksɪs /
•UK / ˈæksɪs /
- noun
- A line about which a rotating body turns
reason
US / 'ri:zn /
•UK / ˈrizən /
- noun
- Ability to think about facts and form a judgment
- Explanation for why something occurred or was done
- verb
- To think and make conclusions in a logical manner
relate
US / rɪ'leɪt /
•UK / rɪˈlet /
- verb
- To demonstrate a logical relationship between
- To understand or sympathize with, e.g. a problem
- To tell a story, or tell about a particular event
here
US / hɪə(r) /
•UK / hɪr /
- adverb
- In this place; at this location, position or time
our
US / 'aʊə(r) /
•UK / aʊr /
- determiner
- Belonging to us
box
US / bɒks /
•UK / bɑ:ks /
- noun
- A marked area of a baseball field
- A container with four straight sides and a lid
- Area of seating in a theater separated from others
- A 4 sided container or shape printed on a page
- Entire amount of something inside a container
- verb
- To strike someone on the side of the head
- To pack an object in a six-sided container
- To fight with gloved hands as a sport
but
US / bət /
•UK / bʌt,bət /
- conjunction
- Used before you say something different, opposite
reasonable
US / ˈri:znəbl /
•UK / ˈrizənəbəl /
- adjecitve
- Being somewhat good, but not great
- Fair and sensible; appropriate
give
US / ɡɪv /
•UK / ɡɪv /
- noun
- Degree of flexibility in something, a material
- verb
- To hand over or present something to someone
- To cause someone to have or experience something
can
US / kæn /
•UK / kən,kæn /
- noun
- A metal container for storing food
- other
- Able to; have the skill to; have the time to
- verb
- To have permission to
- To be possible to do
- To preserve food by sealing it in a metal container
equal
US / 'i:kwəl /
•UK / ˈikwəl /
- adjecitve
- Same in shape, size, or number
- verb
- To add up or be the same as
output
US / 'aʊtpʊt /
•UK / ˈaʊtˌpʊt /
- noun
- Amount of something that is produced
- verb
- To produce data or information, as a computer
not
US / nɒt /
•UK / nɑt /
- adverb
- Word indicating the negative
- (Used to form the negative of verbs)
now
US / naʊ /
•UK / naʊ /
- adverb
- At the present time or moment
- Right away or in the next possible moment
- Used to refer to something that just happened
- Time between the present and a moment in the past
- conjunction
- Resulting from or because of something
really
US / ˈri:əli /
•UK / ˈriəˌli, ˈrili /
- adverb
- Used to stress something that is said; definitely
- In a true or accurate manner
- Very
represent
US / ˌreprɪ'zent /
•UK / ˌrɛprɪˈzɛnt /
- verb
- To depict art objects, figures, scenes; to portray
- To show or describe something in a particular way
- To act on behalf of others in government
- To act or speak for another person or other people
whether
US / ˈweðə(r) /
•UK / ˈhwɛðɚ, ˈwɛð- /
- conjunction
- If something will happen or not
maybe
US / ˈmeɪbi /
•UK / ˈmebi /
- adverb
- Possibly but not certainly; perhaps
tell
US / tel /
•UK / tɛl /
- verb
- To (strongly) advise a person to do something
- To be able to guess
- To say or communicate information to someone
- To inform, but without speaking; indicate
- To have a negative effect on someone
- To order someone to do something; command
- To recognize something based on certain signs
- To report something to an authority
- To explain something or teach someone something
happen
US / 'hæpən /
•UK / ˈhæpən /
- verb
- To take place or occur
different
US / ˈdɪfrənt /
•UK / ˈdɪfrənt /
- adjecitve
- Not of the same kind; unlike other things
value
US / 'vælju: /
•UK / ˈvælju /
- noun
- Importance you attach to something
- Some information expressed as a number
- Stated price of something; worth
- verb
- To place a high importance on something
- To say how much money something is worth
like
US / laɪk /
•UK / laɪk /
- adjecitve
- Being equal in status or kind to something else
- Similar; the same
- adverb
- For example
- preposition
- Used as a filler; used to ad emphasis
- In a way similar to the way something is done
- Such as; for example
- verb
- To want to
- To find something pleasing; to prefer something
then
US / ðen /
•UK / ðɛn /
- adverb
- A time that is not now
- Following another thing in time or arrangement
- Following on reasonably from what was just stated
- At that time, not now
enough
US / ɪˈnʌf /
•UK / ɪˈnʌf /
- adjecitve
- Sufficient to answer the need
- adverb
- To a satisfactory degree
- pronoun
- Equal to what is needed; as much as required
- Adequate number or amount
again
US / ə'ɡen /
•UK / əˈɡɛn /
- adverb
- One more time, once more
get
US / ɡet /
•UK / ɡɛt /
- verb
- To become affected by illness or disease
- To begin to feel or understand an emotion or idea
- To send or bring someone or something home, etc.
- To go somewhere to obtain something
- To (cause to) do a particular thing
- To obtain, receive or be given something
- To currently have
- To prepare for use
- To understand something being said or read
what
US / wɒt /
•UK / hwɑt, hwʌt, wɔt, wʌt,hwət, wət /
- pronoun
- Thing or things that; the same kind as
- Used to emphasize something you are about to say
- adjecitve
- Used to refer to a particular amount, or number
- Used to place emphasis on a particular quality
- adverb
- To a certain degree
- determiner
- Question words used for asking for information
- exclamation
- Used to express excitement, shock, or surprise
- Used to ask people to repeat something they said
about
US / ə'baʊt /
•UK / əˈbaʊt /
- adverb
- To be ready to; going to
- Nearly; approximately; roughly
- Near; next to; close to
- In every direction; in the area of
- preposition
- Concerning or of (a topic)
that
US / ðæt /
•UK / ðæt, ðət /
- adjecitve
- The person or thing being talked about
- Used to identify something both the speakers know
- adverb
- Used to reinforce adjectives and adverbs
- To such a degree
- conjunction
- Used to connect a noun clause
- Used to introduce an adverbial clause
- Used to introduce a noun clause
- determiner
- Used as a noun to refer to something
- pronoun
- Referring an object far away
- Used to refer to the relative pronoun ‘which’
right
US / raɪt /
•UK / raɪt /
- adjecitve
- Correct or true
- The south side of you looking at the rising sun
- adverb
- Exactly in a place or time
- Being appropriate for a particular event
- In a straight or direct manner
- noun
- Something you are legally or morally allowed to do
- Ideal of what is just and good
- Political view based on conservatism
- verb
- To fix something previously wrong or unjust
- To make upright, as a boat that has turned over
two
US / tu: /
•UK / tu /
- number
- 2
only
US / ˈəunli /
•UK / ˈonli /
- adverb
- Just one; just that amount or thing; not more than
- Not very important or serious
- Just that type of thing, person
- Short time ago; not before a certain time
- conjunction
- Except; but
far
US / fɑ:(r) /
•UK / fɑr /
- adjecitve
- A long way away
- Being a long way away
- adverb
- To a large degree or extent
and
US / ənd /
•UK / ənd, ən,ænd /
- conjunction
- Used to refer to two or more things
- Plus; in addition; on top of that
- Used to introduce an action that follows another
put
US / pʊt /
•UK / pʊt /
- phrasal verb
- to make a light stop shining by pressing or moving a switch
- verb
- To move or place a thing in a particular position
- To rate something in importance or value
- To write or say something in a certain manner
pretty
US / 'prɪtɪ /
•UK / ˈprɪti /
- adjecitve
- Being attractive to the eye in a simple way
- adverb
- Very; to a great degree
look
US / lʊk /
•UK / lʊk /
- noun
- Person's beauty or physical attractiveness
- Particular style of dress, clothes, or appearance
- The way someone, something appears to be
- Act of searching for or examining something
- verb
- To appear to be; seem
they
US / ðeɪ /
•UK / ðe /
- pronoun
- Two or more people, animals, or things
just
US / dʒʌst /
•UK / dʒʌst /
- adjecitve
- Proper or appropriate; as is deserved
- Doing or being what is right or fair
- Legally correct; having enough evidence
- adverb
- Almost; nearly
- Exactly at the time of
- Exactly (the same as, like)
black
US / blæk /
•UK / blæk /
- adjecitve
- Color of the sky on a dark night
- noun
- A person with dark skin, often of African origin
- Person's name
- verb
- To fill in something to make it a very dark color
why
US / waɪ /
•UK / hwaɪ, waɪ /
- adverb
- Question word to ask for a reason
- exclamation
- (Used to express surprise or approval)
for
US / fə(r) /
•UK / fɔr,fə /
- preposition
- Used to show the purpose, or need of something
test
US / test /
•UK / test /
- noun
- A medical examination
- Action to establish the truth or nature of
- Examination; questions to measure knowledge
- verb
- To be given a medical examination
- To try to establish the truth or nature of
- To ask a series of questions to measure knowledge
magenta
US / məˈdʒentə /
•UK / məˈdʒɛntə /
- noun
- Deep purplish red
ask
US / ɑ:sk /
•UK / æsk /
- verb
- To say to someone that you want something
graph
US / græf /
•UK / ɡræf /
- noun
- Image expressing numerical data in lines or shapes
- verb
- To show data using images
well
US / wel /
•UK / wɛl /
- adjecitve
- Being in a fortunate, good condition or state
- Healthy and in good condition
- adverb
- In an acceptable, proper, or successful manner
- In a complete, total, or full manner
- A great and considerable degree
- In a successful way, in a good or satisfactory way
- exclamation
- Used to begin or continue a particular statement
- Used to show you want to start saying something
- Used to express that you are waiting for a reply
- You say this to change the topic of a conversation
- Used to indicate you are making a final remark
- noun
- Long deep hole in the ground to get water
- verb
- To cause your eyes to fill with tears