Over which interval is the graph of f (x) = - x2 + 3x + 8 increasing?

(-∞, 1.5)

(-∞, 10.25)

(1.5, ∞)

(10.25, ∞)

Question

Hillary Stanton

19 January, 19:41

+3

Answers (1)

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Turbo · Answer 1

The answer for this question is (-infinity, 1.5) because

when f (x) is increasing f' (x) > 0

-2x + 3 > 0

-2x > - 3

x< 3/2 or 1.5

Over which interval is the graph of f (x) = - x2 + 3x + 8 increasing?(-∞, 1.5)(-∞, 10.25)(1.5, ∞)(10.25, ∞)