Answer
Slope is $1.25$.
Approximately, there's an increase of 1.25 million households with televisions every year.
Work Step by Step
$y$ is the number of households with televisions.
$x$ is the year.
Slope $=\frac{\Delta y}{\Delta x}$
Slope $=\frac{112-109.5}{2007-2005}$
Slope $=\frac{2.5}{2}$
Slope $=1.25$
Approximately, there's an increase of 1.25 million households with televisions every year.