Question

The vertex of this parabola is at (2,-4). When the x value is 3, the y value is -1. What is the coefficient of the squared expression in the parabolas equation?

A.1
B.-2
C.5
D.3

Answer 1

d !

Explanation:

Answer 2

the coefficient of the squared expression in the parabolas equation: D. 3

Explanation:

y = a (x-h)² + k parabola equation

y=-1 and x=3 vertex(h,k): (2,-4)

-1 = a * (3-2)² + (-4)

-1 = a - 4

a = -1 + 4 = 3

equation: y = 3 * (x-2)² -4