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Math Help - Graph Help

  1. #1
    Newbie
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    Graph Help

    1. Using the equations, give the points to plot a graph.




      1. y = 4x 2 0 ≤ x ≤ 5
      2. y = -2x + 6 -3 ≤ x ≤ 5
      3. y = x2 + x 6 -5 ≤ x ≤ 5




    1. Remove the brackets of the following expressions

      1. (x + 2) (x + 3)
      2. (x + 2) (x - 5)
      3. (x - 5) (x - 1)
      4. ( x 3) x + 4)

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  2. #2
    Senior Member apcalculus's Avatar
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    Quote Originally Posted by Soul View Post
    1. Using the equations, give the points to plot a graph.




      1. y = 4x 2 0 ≤ x ≤ 5
      2. y = -2x + 6 -3 ≤ x ≤ 5
      3. y = x2 + x 6 -5 ≤ x ≤ 5


    This page may be helpful if graphing on the TI-83:

    Graphing Piece-wise functions on the TI-83.


    1. Remove the brackets of the following expressions

      1. (x + 2) (x + 3) = x*x + x*3 + 2*x + 2*3 = ... (simplify)
      2. (x + 2) (x - 5)
      3. (x - 5) (x - 1)
      4. ( x 3) x + 4)

    Mine in red.
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  3. #3
    Newbie
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    Jul 2009
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    Thanks

    I do not have to plot the graph, I just need to find the points. But I have saved the site you sent might be useful in the future.

    So I still have to simplify, to complete the equation, when removing the bracket?
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  4. #4
    Newbie
    Joined
    Jul 2009
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    Graph

    I have gone to your recommended website but have not been able to access anything, If you comfortable using the website, can you give me some hints as to how to use the website.

    Entering a Polynomial Function on a TI-83
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  5. #5
    MHF Contributor
    Joined
    Mar 2007
    Posts
    1,240

    Talking

    Quote Originally Posted by Soul View Post
    I do not have to plot the graph, I just need to find the points.
    To find plot-points, pick any (allowable) x-value, plug it into the formula, and solve for the corresponding y-value.

    Quote Originally Posted by Soul View Post
    So I still have to simplify, to complete the equation, when removing the bracket?
    To simplify multiplied polynomials, yes, you need to complete the multiplication. To learn how this works, try here.

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