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What Coefficient Indicates Whether the Graph of the Parabola Opens f(x)=−7x2+3x+9f ( x ) = - 7 x ^ { 2 } + 3 x + 9

Question 23

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What coefficient indicates whether the graph of the parabola opens upward or downward? f(x)=−7x2+3x+9f ( x ) = - 7 x ^ { 2 } + 3 x + 9

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