Question

closed

Answer 1

The stretch/compression factor is a in the equation

y=a(x-h)^2+k

(h,k) is the vertex

if we plug all this in along with a point (x,y) we can solve for a.

so well use the y intercept as a coordinate.

-17=a(0-2)^2-5

now can you solve for a?

Answer 2

can you help me with that part

Answer 3

-17=a(0-2)^2-5

square the parentheses

-17=4a-5

add 5 to both sides

-12=4a

and the last step is?

Answer 4

it's -4 right?

Answer 5

a=-3 because

-12/4=-3