SOLUTION: Find the equation of the parabola with the given conditions: > Horizontal axis, vertex on y-axis and passing through (2,4) and (8,-2)

Question 968946: Find the equation of the parabola with the given conditions:
> Horizontal axis, vertex on y-axis and passing through (2,4) and (8,-2)
Answer by josgarithmetic(39625) (Show Source): You can put this solution on YOUR website!
Some form of , because you are not sure where along the y-axis is the intercept.

Your two given points will allow to find a and k.

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The expected format equation, and the two points to be on the graph:

, so this system is solvable for a and k.
Use any whatever good algebra skills you have.

their reciprocals are therefore also equal.

The possibility of two different values for k, and each of them will have a corresponding value for a.

OR .

You continue on to find values of "a".
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