Question

50 PTS
Which relation is a function?

Answer 1

• Options C and D

Explanation:

Looking at the graphs we can state that:

A) Not a function as it fails the vertical line test. The three points has same x-coordinate of -1.

B) Not a function as it fails the vertical line test. The three points has same x-coordinate of 1.

C) Is a function as each x-value has a unique y-value:

• (-3, 2), (- 1, 1), (0, - 3), (4, 1)
• Passes the vertical line test

D) Is a function as each x-value has a unique y-value:

• (-3, -2), (-2, - 1), (0, 3), (1, 0), (2, - 3)
• Passes the vertical line test