Question

What is an equation of a parabola with the given vertex (-2,5) and passes through these points: (-3,13) and (-1, 13)

Answer 1

This is the standard vertex formula
y=a(x-h)^2+k
where the vertex is h,k

Answer 2

-2,5

Answer 3

that means h=-2 and k=5

Answer 4

yes

Answer 5

y=a(x-(-2)^2+5

Answer 6

i know but what is a

Answer 7

a=?

Answer 8

substitute (x,y) = (-3,13)
13=a(3+2)^2+5
13 = a(5)² + 5
13 = a(25) + 5
13 = 25a + 5
8=25a
a=8/25