A computer store decides to increase the prices of all the items it sells by 15%. The store manager uses matrices to prepare the
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F(x) is a quadratic equation with the x-side squared and a is positive which means that the graph of the function is a parabola facing up. The range of f(x) is given by {y|y ≥ k}, where k is the y-coordinate of the vertex.
, written in vertex form is
, where (h, k) = (-1, -11)
Therefore, range ={y|y ≥ -11}
Therefore, range ={y|y ≥ -11}