# Math 11

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with quadratic functions how do you know if a parabola on a graph is supposed to open upwards or downwards?

ex. y=-4(x+1)2+4

[The 2 after the bracket is a square)

• Math 11 -

a parabola on a graph opens upwards if the "a" value in y=a(x+b)^2+c is positive. If "a" is negative, it opens downwards.

in the example it would open down, because the "a" value is negative

• Math 11 -

OHHHH !!!
okaay thanks !

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