Question

The vertex of this parabola is at (-2,-3). When the y-value is -2 the x-value is -5. What is the coefficient of the square term in the parabola’s equation?

I think it’s -3

Answer 1

a = -3

Explanation:

You're correct.

The form of the equation you need is

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

Filling in our h, k, y, and x:

`-5=a(-2+3)^2-2` which simplifies to

`-5=a(1)-2` which simplifies further to

`a=-3`

Very good!!!! These can be tricky, but you got it!!