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Thread: Parabola Equation: From graph, find equation & transformation of y=x^2

  1. #1

    Exclamation Parabola Equation: From graph, find equation & transformation of y=x^2

    This is the parabola:
    133 - 1.jpg

    I need to

    1) write the equation of the parabola, and

    2) Describe the transformation of y=x2

    I don't know if it is one of these, or some other:

    a(x-h)+K OR ax2+bx+c

    Your help much appreciated
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    Last edited by stapel; 03-15-2017 at 03:00 PM. Reason: Deleting e-mail address for user's security.

  2. #2
    Elite Member stapel's Avatar
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    Cool

    Quote Originally Posted by grinboy1 View Post
    This is the parabola:
    133 - 1.jpg
    The image is too blurry for me to be sure of the axis labelling. But you can see it clearly, right? So please reply with the plot points you've gathered from the graph, including the vertex and the x-intercepts.

    Quote Originally Posted by grinboy1 View Post
    I need to

    1) write the equation of the parabola, and
    You know that the vertex form of the equation is y - k = a(x - h)^2. You've found the vertex. You've found at least two more points. You plugged in the vertex and one of the other points, and solved for "a". What equation did you get?

    Quote Originally Posted by grinboy1 View Post
    2) Describe the transformation of y=x2

    I don't know if it is one of these, or some other:

    a(x-h)+K OR ax2+bx+c
    Has your class not yet covered "function transformations"?

    Thank you!

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