Question

Which statement about graph C and graph D is true?

Answer 1

To be a function, every x value must be assigned to a unique y-value. Do you think graph C and D are functions using this definition? You may also have heard of the vertical line test which is another way to think of this definition.

Answer 2

im still not sure

Answer 3

Consider the graph C, at x = 0 there are two y-values :3 and -3. Do you see the two ordered pairs (0, 3) and (0, -3) on the C graph? This violates the definition of a function. Graph C is a relation, not a function. You try graph D.

Answer 4

it would be d

Answer 5

Nicely done.