Answer
$153 \text{ cigarettes}$
Work Step by Step
Substituting $x=20$ in the given equation, $
y=-94.8x+2049
,$ then the value of $y$ is
\begin{array}{l}\require{cancel}
y=-94.8(20)+2049
\\\\
y=-1896+2049
\\\\
y=153
.\end{array}
Hence, the average annual number of cigarettes smoked by an American adult in 2020 is $
153 \text{ cigarettes}
.$
