SOLUTION: write an equation for the parabola with vertex at (2, -1) and y-intercept 5

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Question 305899: write an equation for the parabola with vertex at (2, -1) and y-intercept 5
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
Use the vertex form.
y=a%28x-h%29%5E2%2Bk
where (h,k) is the vertex.
y=a%28x-2%29%5E2-1
Now use the point (0,5) to solve for a.
5=a%280-2%29%5E2-1
5=4a-1
4a=6
a=6%2F4=3%2F2
highlight%28y=%283%2F2%29%28x-2%29%5E2-1%29
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