Question

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

a) 2 - x = x - y
b) 2
`x^(4)` + 4 =
`√(y + 2)`
c) y = -2
`x^(2)` + 16x + 34
d) x -
`y^(2)` = 13

Answer 1

d. x - y^2 = 13

Explanation:

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