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

Answer:

a = -3

Step-by-step 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!!