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6-72.

Find the equation in form of the parabola that passes through the points .

Substitute the point into where and .

Repeat the previous step with and to create two more equations.

You have created a system of three equations with three variables. Solve the system of equations.
Refer to problem 6-71 for help.

. Substitute for a, b, and c to find the equation of the parabola.

Use the eTool below to graph the answer.
Click the link at right for the full version of the eTool: 6-72 HW eTool