Answer
a) Please see the graph.
b) Yes, the point is on the line. The ordered pair means that, in the year 2010, there were 189 million licensed drivers in the United States.
Work Step by Step
a) The graph was made using graphing software.
Let $x=10$
$y=2.2x+145$
$y=2.2*10+145$
$y=22+145$
$y=167$
Let $x=15$
$y=2.2x+145$
$y=2.2*15+145$
$y=33+145$
$y=178$
Let $x=20$
$y=2.2x+145$
$y=2.2*20+145$
$y=44+145$
$y=189$
$(10,167), (15,178)$, and $(20, 189)$ are on the line.
b)
$y=2.2x+145$
$y=2.2*20+145$
$y=44+145$
$y=189$
