We can find the slope of a line by means of the following formula:
[tex]m=\frac{y2-y1}{x2-x1}[/tex]
Where (x1,y1) and (x2,y2) are two points where the line passes through. In this case, we can take the points (2002,77) and (2006,85). by replacing the x and y-coordinates of these points into the above formula, we get:
[tex]m=\frac{85-77}{2006-2002}=\frac{8}{4}=2[/tex]
Then, the slope of the line equals 2. This means that every year, there are 2 million more households with personal computers.
