Answer
$a)$ By observation, the graph is increasing for all values of t
$b)$ The graph changes concavity at $t\approx6 $ . And the graph is concave up for $0\leq t \lt6$ and concave down for the rest of values of $t$.
Work Step by Step
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Calculus Concepts: An Informal Approach to the Mathematics of Change 5th Edition
by LaTorre, Donald R.; Kenelly, John W.; Reed, Iris B.; Carpenter, Laurel R.; Harris, Cynthia R.
Published by
Brooks Cole
ISBN 10:
1-43904-957-2
ISBN 13:
978-1-43904-957-0
Chapter 1 - Ingredients of Change: Functions and Limits - 1.2 Activities - Page 20: 8
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