The average rate of change is found with the following formula
[tex]\frac{f(b)-f(a)}{b-a}[/tex]
Where a=40 and b=50.
According to the given table, t=40 is related to f(t)=48.2, and t=50 is related to 56.6. Using the formula above, we have
[tex]\frac{56.6-48.2}{50-40}=\frac{8.4}{10}=0.84[/tex]
Therefore, the average rate of change between t=40 and t=50 is 0.84.
