The graph of a quadratic function is given. Write the function's equation, selecting from the following options.

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The graph of a quadratic function is given. Write the function's equation, selecting from the following options.
Solve each polynomial inequality in Exercises 1–42 and graph the solution set on a real number line. Express each solution set in interval notation. x2+5x+4>0
Use the four-step procedure for solving variation problems given on page 447 to solve Exercises 1–10. y varies directly as x and inversely as the square of z. y = 20 when x = 50 and z = 5. Find y when x = 3 and z = 6.
Use the Rational Zero Theorem to list all possible rational zeros for each given function. f(x)=x5−x4−7x3+7x2−12x−12
Use the Rational Zero Theorem to list all possible rational zeros for each given function. f(x)=4x4−x3+5x2−2x−6
In Exercises 5–6, use the function's equation, and not its graph, to find (a) the minimum or maximum value and where it occurs. (b) the function's domain and its range.