Question 926018


Recall that rate of change units are output units per input units.
{{{x=0.5}}}  ->input  {{{y=5}}} ->output
{{{x=3}}}		{{{y1=50}}}

rate of change : 
{{{(y1-y)/(x1-x)=(50-5)/(3-0.5)=(45/2.5)=18}}}% 

On average,rate of change of {{{18}}}% individuals are free of headache pain per hour between {{{0.5h}}} and {{{3h}}}.