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which quadratic function has its vertex at (-2,7) and opens down?
[tex]The \ vertex \ form \ of \ the \ function \ is: \\ \\y = a(x - h)^2 + k\\ \\vertex = \ is \ the point \\ \\(h, k) = (-2,7)\\\\h=-2\\k=7[/tex]
[tex]y=a(x-(-2))^{2} +7\\\\y=a(x+2)^{2} +7 \\\\ opens \ up \ down \ for : \ a < 0 \\ For \ instance, \ letting \ a = -1 \ gives \ this \ parabola: \\\\y= -(x+2)^{2} +7[/tex]
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