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Math Help - Sketch Graphs

  1. #1
    Member
    Joined
    Dec 2007
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    80

    Post Sketch Graphs

    Hi, could someone please explain how i would sketch the graph of y=9-x^2.
    Thnx
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  2. #2
    Super Member
    Joined
    Oct 2007
    From
    London / Cambridge
    Posts
    591
    i guess your doing GCSE or As level maths

    first you must know what the graph of y=x^2 looks likes before you can even start.

    you must know that -x^2 is a reflection of x^2 in the __ axis

    and then you should also know that +9 is a shift of _ units along the P_s_t_v_ _ axis.
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