Question

Which one of the given equations does not represent a function?

a) 2 - x = x - y
b) 2$x^{4}$ + 4 = $\sqrt{y + 2}$
c) y = -2$x^{2}$ + 16x + 34
d) x - $y^{2}$ = 13

Answer 1

Answer:

d. x - y^2 = 13

Step-by-step explanation:

This is a parabola which is symmetrical about the x axis so will not pass the vertical line test for a function.