Answer
(a)
Work Step by Step
It has the form: $a^{-x}$. So, the graph must be decreasing.
$f(0)=2^0=1$. That is, the point $(0,1)$ lies on the graph of $f(x)=2^{-x}$
We conclude that the graph of $f(x)=2^{-x}$ is (a)
Algebra and Trigonometry 10th Edition
by Larson, Ron
Published by
Cengage Learning
ISBN 10:
9781337271172
ISBN 13:
978-1-33727-117-2
Chapter 5 - 5.1 - Exponential Functions and Their Graphs - 5.1 Exercises - Page 368: 15
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