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 = $\frac{1}{2}$ into the equation

The first step is therefore

y = - 2($\frac{1}{2}$)² + 2 ($\frac{1}{2}$) - 3 → D