SOLUTION: Find the equation of the parabola centered at the origin passing through points (-2,-5) and (2,-5)? Please show work so I know how to do it. Thanks.

Question 824633: Find the equation of the parabola centered at the origin passing through points (-2,-5) and (2,-5)? Please show work so I know how to do it. Thanks.
Answer by josgarithmetic(39620) (Show Source): You can put this solution on YOUR website!
Compare with standard form, .
You have h=0, so y=ax^2+k and also k=0 because vertex is at the origin.
You have and want to just find a.

Notice the two given points are for the same y value. With vertex at origin, the vertical line of symmetry is at x=0. You can use either given point to find a.

Solve for a.
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