f' < 0 and f'' 0 on (a, b) describes a graph that is

Going down and curving up (like the right half of a U) Decreasing + concave up — slope is negative but slope is increasing (becoming less negative).

Going down and curving up (like the right half of a U)

Curve Sketching

AP Calculus AB· difficulty 3/5

f' < 0

Explanation

Decreasing + concave up — slope is negative but slope is increasing (becoming less negative).

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