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Which of the following quadratic functions has a graph that opens downward? A.y= 3/2x^2 -3x+15 B.y= 5/2x-3x^2 C.y= 3x^2-x-1 D.y= -(2x^2-1)
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Which of the following quadratic functions has a graph that opens downward? A.y= 3/2x^2 -3x+15 B.y= 5/2x-3x^2 C.y= 3x^2-x-1 D.y= -(2x^2-1)

User Brnby
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1 Answer

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it says if

ax^2+bx+c=0

a<0

answer is D because, there is (-) near of x^2

User Gilson Viana
by
5.9k points
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