### Home > A2C > Chapter 7 > Lesson 7.1.5 > Problem 7-72

7-72.

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

Substitute the point where

*and*

*.*

Repeat the previous step with

You have created a system of three equations with three variables. Solve the system of equations.

Refer to problem 6-71 for help.

*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: *7-72 HW eTool*