Question

The vertex of this parabola is at (-5, -2). When the x-value is -4, the y-value is 2. What is the coefficient of the squared expression in the parabola's equation?

A. 1
B. 4
C. -1
D. 5

Answer 1

V(-5;-2)

`f(x)=a(x+5)^2-2`


`x=-4`.
`y=2`


`2=a(-4+5)^2-2`

`2=a*1-2`

`2=a-2`

`a=4`

The answer: B
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