## Algebra and Trigonometry 10th Edition

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)