The quadratic function $f(x) = a(x-h)^2 + k$, $a \neq 0$, is in vertex form. The graph of $f$ is called a parabola whose vertex is the point $(h,k)$. The graph opens upward if and opens downward if
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The quadratic function f(x) = a(x - h)^2 + k, where a ≠ 0, is in the form: y = ax^2 + bx + c. The graph of f is called a parabola, whose vertex is the point (h, k). The graph opens upward if a > 0 and opens downward if a < 0.
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The quadratic function f(x) = a(x - h)^2 + k is in standard form. (a) The graph of f is a parabola with vertex (h, k). (b) If a > 0, the graph of f opens upwards. In this case, f(h) = k is the value of f. (c) If a < 0, the graph of f opens downwards. In this case, f(h) = k is the value of f.
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The quadratic function f(x) = a(x - h)^2 + k is in standard form. (a) The graph of f is a parabola with vertex (h, k). (b) If a > 0, the graph of f opens upwards. In this case, f(h) = k is the minimum value of f. (c) If a < 0, the graph of f opens downwards. In this case, f(h) = k is the maximum value of f.
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