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    File: 1330029591.jpg-(53 KB, 462x520, 2841698_700b.jpg)
    53 KB Anonymous 02/23/12(Thu)15:39 No.4396832  
    So /sci/, help me please. In a quadratic function: f(x)=a(x-h)2+k, where (h,k) represent the tip of the parabole, what does a represent? I'm trying to understand quadratic functions, but i can't, help me please
    >> Anonymous 02/23/12(Thu)15:43 No.4396840
    how fast the parabola gets wider
    >> Anonymous 02/23/12(Thu)15:44 No.4396845
    A represents a skretch or shrink.

    Think if it was one, how your y's would be unaffected, but if a was changed to two then your y's would be twice as high thus narrowing the graph.
    >> Anonymous 02/23/12(Thu)15:51 No.4396870
    >>4396832
    Oh wow that image is pretty fu-
    >Bottom right corner
    kill yourself
    >> Anonymous 02/23/12(Thu)15:52 No.4396874
    protip: if you want to see what it does, graph it a couple times with a few different numbers.
    >> Anonymous 02/23/12(Thu)16:27 No.4396994
    >>4396870
    Did not find it there, it was sent by a friend, i don't go there.
    >>4396874
    >>4396845
    I know how it affects the graph, but when i have to write the function when presented with a graph and all coordenades, i can't find a value for A. Help me /sci!!!!
    >> Anonymous 02/23/12(Thu)17:53 No.4397286
    Um the easiest way to find a would be having two graphs.

    Say you had points at 1,2 on one graph and 1,4 on the second. Well the function of the second would have an a of 2. Being relative to the first.

    You could also sub the vertex and y intercept in and solve for a.

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