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Home > CCA > Chapter 11 > Lesson 11.1.1 > Problem 11-13


Based on each graph, give a possible equation for the parabola. 11-13 HW eTool (Desmos). Homework Help ✎

  1. graph a

    A quadratic equation forms a parabola when graphed. When equals or , equals . This means that and are roots of the equation. If you know the roots, can you find the factors for a possible equation?

    The factors for a possible equation are

  1. graph b

    See the hint for part (a).

  1. graph c

    See the hint for part (a). Because the parabola intersects the -axis at only one point, its equation has a single factor, which is squared.

Use the eTool below to help you write and check a possible equation for each parabola.
Click on the link at right for the full eTool version: CCA 11-13 HW eTool