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Home > A2C > Chapter 4 > Lesson 4.2.1 > Problem 4-65

4-65.

Draw the graph of . 2-82 HW eTool (Desmos). Homework Help ✎

  1. Find the - and -intercepts.

    To find the -intercept, substitute for .

    To find the -intercepts, factor the equation and substitute for .

    The -intercept is and the -intercepts are and 

  2. Where is the line of symmetry of this parabola? Write its equation.

    To find the line of symmetry, average the -values of the
    -intercepts.

  3. Find the coordinates of the vertex.

    Substitute the -value for the line of symmetry into the equation.

Use the eTool below to graph the equation.
Click the link at right for the full version of the eTool: CCA2 2-82 HW eTool