Answer
a) Please see the graph.
b) $(5,66.5)$
c) The ordered pair means that, in 2003, 66.5 percent of households had computers.
Work Step by Step
a)
Let $x=0$
$y=5.6x+38.5$
$y=5.6*0+38.5$
$y=38.5$
Let $x=1$
$y=5.6x+38.5$
$y=5.6*1+38.5$
$y=5.6+38.5$
$y=44.1$
Let $x=2$
$y=5.6x+38.5$
$y=5.6*2+38.5$
$y=11.2+38.5$
$y=49.7$
Three points on the line are $(0, 38.5), (1,44.1),$ and $(2,49.7)$.
b)
$y=5.6x+38.5$
$y=5.6*5+38.5$
$y=28+38.5$
$y=66.5$