Question

. Which function's graph has a vertex at (-1, -3) and contains the point (2, 15)?

HELPPP PLEASEE

Answer 1

2(x+1)²-3

Explanation:

Using the vertex formula we can write the follwoing equation

y=a(x+1)²-3

We need to solve for a

we know that when x= 2 y = 15

So we can write

15=a(2+1)²-3

15=9a-3

18=9a

a=2

Which means our final equation is

2(x+1)²-3

in standard form (just in case)

2x²+4x-1