contestada

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

Respuesta :

Kmieteczka
V(-5;-2)
[tex]f(x)=a(x+5)^2-2[/tex]

[tex]x=-4[/tex]. [tex]y=2[/tex]

[tex]2=a(-4+5)^2-2[/tex]
[tex]2=a*1-2[/tex]
[tex]2=a-2[/tex]
[tex]a=4[/tex]

The answer: B
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