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OpenStudy (anonymous):
Determine whether the graph of y = −5x^2 + 3x + 8 opens up or down and whether it has a maximum or minimum point.
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OpenStudy (anonymous):
negative a means it opens down. Your a is -5, so it opens down.
OpenStudy (anonymous):
If it opens down, the parabola has a max.
OpenStudy (anonymous):
Otherwise it has a min. Thus in your case, opens down and has a max.
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