On what interval is f increasing? (18, infinity) (9, infinity) (-81, infinity) (

Question

On what interval is f increasing? (18, infinity) (9, infinity) (-81, infinity) (-9, infinity) On what interval is f decreasing? (-infinity, 9) (-infinity, -9) (-infinity, -81) (-infinity, 18) Answer the following for the given quadratic function. f(x) = x2 + 18x Does the graph of f open up or down? Down Up What is the vertex (h, k) of f? (h, k) = (Simplify your answer. Type an ordered pair.) What is the axis of symmetry? The axis of symmetry is . (Type an equation. Simplify your answer. Type any numbers as integers or fractions.) What are the intercepts? Select the correct choice below and fill in any answer boxes within your choice. The intercept(S) is/are . (Type an ordered pair. Use a comma to separate answers as needed.) There are no intercepts. Which of the following is the graph of f? Which of the following is the graph of f? What is the domain of f? All positive numbers All real numbers x2 + 18x x(x + 18) What is the range of f? {y|y -81} {y|y 18} {y|y -9} {y|y 9}

Explanation / Answer

h) (-9, infinity)

i) (-infinity, -9)

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