Question

Don't answer. You can explain though.
Which relation is a function?

Answer 1

A relation is a function if it follows the Vertical Line test, graphically.
A relation is a function if each x-value has a unique y-value.
In a function, an x value can't have 2 y-values.

Answer 2

which graph has 1 y value for each x value

Answer 3

Whick side is x? the 123 or 5s.

Answer 4

If one x value has one y-value then its a function. If any x has more than one y, then its a function.

Answer 5

@sweetburger

Answer 6

The x's point to the y's.
See the arrows on the lines? :)

Answer 7

@jdoe0001 Can you show me how they would have repeats? :)

Answer 8

@jdoe0001 @jigglypuff314

Answer 9

a function has to have unique x values
so there can not be repeats for x's