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OpenStudy (anonymous):
Hi.does anyone know how to know when a parabola opens up or down?
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OpenStudy (anonymous):
thanks you guys.
OpenStudy (anonymous):
If the parabola has a co-efficient that is positive it opens up, if it is negative it opens down.
OpenStudy (anonymous):
When the coefficient of \[x^{2}\] is negative it opens down and if it is positive it open up
OpenStudy (amistre64):
a parabola normally opens up; y = x^2 to flip it , you negate it
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