The points given are:
(2008, 240) and (2010, 280)
The formula for calculating mid-point is:
[tex](\frac{x_1+x_2}{2},\frac{y_1+y_2}{2})[/tex]
From the point given:
x₁=2008 y₁=240 x₂=2010 y₂=280
[tex](\frac{2008+2010}{2},\frac{240+280}{2})[/tex][tex]=(\frac{4018}{2},\frac{520}{2})[/tex][tex]=(2009,260)[/tex]
Therefore, the sales of cars in 2009 is 260 millions.
