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6-81.

Find an equation for the parabola that passes through the points . 6-81 HW eTool (Desmos). Homework Help ✎

Create a system of three equations in three variables using the points and the equation .

Substitute the value for c into the first and third equations to simplify.
You now have a system of two equations with two variables to solve.

Use the eTool below to check your solution graphically.
Click the link at right for the full version of the eTool: CCA2 6-81 HW eTool