SOLUTION: Write the equation of a parabola in vertex form if the vertex is (-2,8) and y -intercept is 0.

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Question 364579: Write the equation of a parabola in vertex form if the vertex is (-2,8) and y -intercept is 0.
Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!


Hi,

*Note: vertex form of a parabola, 

y=a%28x-h%29%5E2+%2Bk where(h,k) is the vertex

vertex is (-2,8)

y = a(x+2)^2 + 8

y -intercept is 0. (0,0) a point on the parabola

0 = 4a + 8

-2 = a

y = -2(x+2) + 8

graph%28+300%2C+300%2C-10%2C10%2C-10%2C10%2C-2%28x%2B2%29%5E2+%2B8%29+