It can be shown that for the quadratic function f(x) = ax²+bx+c, the x-coordinate of -b the parabola's vertex will always be x = - 2a For each function below, -b ● Use the vertex formula x = to determine the x-coordinate of the parabola's 2a vertex. (Show your work!) Evaluate a in order to determine the y-coordinate of the vertex. (Show your 2a work!) ● Graph f(x) on your calculator to verify that the coordinates of the vertex that you found are correct. 1. f(x)=3x²-12x+7 - f(x)=-2x²-12x-10 5 f(x) = x² 3 2 4

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