In 2009, the traffic fatality rate in the United States was the lowest since the federal government bean records in 1966. There were 43,510 highway deaths in 2005. This number decreased to 33,963 in 2009. Find the average rate of change in the number of highway deaths from 2005 to 2009. Please show all work.
Rate of change of deaths = change of deaths/chnage of time = (33963-43510)/(2009-2005) = -9547/4
=> -2386.75 deaths/yr