Question 1106268: How would I find the equation of a parabola whose vertex is (0,0) and two other points are (1,-2) and (-1,-2)? Found 2 solutions by josgarithmetic, math_helper:Answer by josgarithmetic(39617) (Show Source):
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The vertex form of a parabola is where (h,k) = coordinates of the vertex
The vertex is given to be at (0,0), simplifying the above to
Picking one of the other two points (1,-2) allows us to find a: —>
Since a<0, the parabola opens downward