Question

Selct the correct first step for finding the y-coordinate of the vertex of the equation y=-2x^2+2x-3, given that the x-coordinate of the vertex is 1/2.

A. -(4/4)+ (4/4)-3
B. 8/4-3
C. -1/2
D. -2(1/2)^2+ 2(1/2)-3

Answer 1

D

The first step is to substitute x =
`(1)/(2)` into the equation

The first step is therefore

y = - 2(
`(1)/(2)`)² + 2 (
`(1)/(2)`) - 3 → D