Question

What relation is a function of X?

Answer 1

• Graph D

Explanation:

• A function relates each element of input values with exactly one element of output values.

A.

We have repeat values of x with different values of y:

• (1, 2) and (1, 0)

This is not a function of x.

B.

• All values of x are repeat with different values of y.
• This is not a function of x

C.

• x = 3y² - 7
• This is a function of y and not a function of x.

D.

• This is a function of x as it passes the vertical line test