SOLUTION: The vertex of a parabola is (-1.5, -12.5), and its y-intercept is (0, -8).

Algebra ->  Finance -> SOLUTION: The vertex of a parabola is (-1.5, -12.5), and its y-intercept is (0, -8).      Log On


   

Question 981193: The vertex of a parabola is (-1.5, -12.5), and its y-intercept is (0, -8).
Answer by josgarithmetic(39620) About Me  (Show Source):
You can put this solution on YOUR website!
y=a%28x%2B1.5%29%5E2-12.5, just using standard form and the given vertex.

Solve the equation for a.
a%28x%2B1.5%29%5E2=y%2B12.5
a=%28y%2B12.5%29%2F%28x%2B1.5%29%5E2

Use the given y-intercept coordinates in the formula for a.
a=%28-8%2B12.5%29%2F%280%2B1.5%29%5E2
a=%284.5%29%2F%281.5%5E2%29
a=2

highlight%28y=2%28x%2B1.5%29%5E2-12.5%29