A parabola opening up or down has vertex (0,4) and passes through (-12

Pearl Carney

Pearl Carney

Answered question

2021-11-16

A parabola opening up or down has vertex (0,4) and passes through (-12,8). Write its equation in vertex form. 
y=?

Answer & Explanation

Eprint

Eprint

Beginner2021-11-17Added 13 answers

We have: 
vertex (0,4) and point (-12, -8)  
Solution: 
y=a(xh)2+k 
8=a(120)2+4 
8=144a+4 
144a=84 
a=12144 
a=112 
y=112(x0)2+4 

Result:
y=x212+4

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