Question

Which equations have exactly one y-value for any given x-value? Select all that apply.A.y = −xB.x = 4C.y = x2D.y = x3

Answer 1

x=4 is a vertical line, therefore there are more than one y-value for x=4.

y=x^2 is a parabola, and we can find one corresponding y-value for 2 x-values.

y= -x and y=x3 are functions in which one x-value has one corresponding y-value.

The answers are: A and D.