Question

Is this relation a function? Justify your answer.

A. Yes, because every x-and y-value is positive.
• B. Yes, because the number of x values is the same as the number of
y-values.
• C. No, because two points with the same x-value have different y
values.
• D. No, because two points with the same y-value have different x-
values.

Answer 1

C.

Explanation:

• C. No, because two points with the same x-value have different y

values. Points with coordinates (7;4) and (7;6).