Precalculus: Concepts Through Functions, A Unit Circle Approach to Trigonometry (3rd Edition)

Published by Pearson
ISBN 10: 0-32193-104-1
ISBN 13: 978-0-32193-104-7

Chapter 5 - Trigonometric Functions - Cumulative Review - Page 461: 12

Answer

$y=2⋅3^x$

Work Step by Step

The function has the form of $y=Ab^x$ We see that the point $(0,2)$ lies on the graph. This means that $x=0; y=2$ Now, plugging in these values: $2=Ab^0 \implies A =2$ Next, we have: $x=1, y=6$ Thus: $6= A b^1 \implies 6=2b $ or, $b=3$ Thus, the required form of the function is: $y=2⋅3^x$
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