posted by Lee on .
Suppose a parabola has a vertex (-4,7) and also passes through the point (-3,8) Write the equation of the parabola in vertex form.
I believe h=-4
Not sure what to do from here.
from the vertex, you know that
y = a(x+4)^2 + 7
Now just plug in (-3,8) to find a:
8 = a(1)+7
1 = a
y = (x+4)^2 + 7
I'm not sure what your saying
you seemed to be able to figure out h and k for the vertex, so what's the hangup? All I did was use your equation and use the values x=-3 and y=8 to solve for a.
Is this right?
well, I'd say yes, since it agrees with the equation I posted above. (sort of; not sure what the 4 means)
sorry was y we have to show our steps when figuring problems thank you