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OpenStudy (anonymous):
Determine whether the graph of y = 2x2 + 7x − 9 opens up or down and whether it has a maximum or minimum point.
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OpenStudy (anonymous):
leading coefficient of quadratic is a positive number so parabola opens up
OpenStudy (anonymous):
what @mukushla said looks like this http://www.wolframalpha.com/input/?i=y+%3D+2x2+%2B+7x+%E2%88%92+9+
OpenStudy (anonymous):
so it has a minimum
OpenStudy (anonymous):
so up:minimum?
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