Between 2000 and 2010, the use of opioids was
exploding in the USA. We use MME (Morphine
Milligram Equivalents) as a measure of doses used.
It went from 91 billion doses in 2000 to a level 159%
higher in 2009.
Assuming a linear trend (billion of doses as a
function of years t), what is the slope of the linear
function of the use of opioids, in billion? Assume
that t=0 in 2003.
If needed, round your answer to 2 digits after the
decimal point.