Question

The number of crimes that occurred in a certain city per 1000 people had decreased from 45.5 in 1920 to 44.5 in 1945. Find the average rate of change in the number of crimes per 1000 people that occurs from 1920-1945.*picture is answer set up*

Answer 1

Given

45.5 in 1920

44.5 in 1945

Procedure

r: rate of change

$\begin{gathered} r=\frac{44.5-45.5}{1945-1920} \\ r=\frac{-1}{25} \end{gathered}$

The average rate of change was -1/25 = -0.04 crimes per 1000 people per year