[9.01] Determine whether the graph of y = −5x2 + 3x + 8 opens up or down and whether it has a maximum or minimum point.

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[9.01] Determine whether the graph of y = −5x2 + 3x + 8 opens up or down and whether it has a maximum or minimum point.

Mathematics
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At vero eos et accusamus et iusto odio dignissimos ducimus qui blanditiis praesentium voluptatum deleniti atque corrupti quos dolores et quas molestias excepturi sint occaecati cupiditate non provident, similique sunt in culpa qui officia deserunt mollitia animi, id est laborum et dolorum fuga. Et harum quidem rerum facilis est et expedita distinctio. Nam libero tempore, cum soluta nobis est eligendi optio cumque nihil impedit quo minus id quod maxime placeat facere possimus, omnis voluptas assumenda est, omnis dolor repellendus. Itaque earum rerum hic tenetur a sapiente delectus, ut aut reiciendis voluptatibus maiores alias consequatur aut perferendis doloribus asperiores repellat.

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a graph is concave downwards when it has a maxima and concave upward when it has a minima|dw:1435251272624:dw|
at either maxima or minima , the slope of the curve is zero, so dy/dx=0 |dw:1435251358155:dw|
to find whether it is maxima or minima , use double derivative it is maxima when when double derivative <0, and hence the curve will be concave downwards. it is minima when double derivative>0, and hence the curve will be concave upwards

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that didn't help at all :)

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