Question

The number of visits to public libraries increased from 1.4 billion in 1998 to 1.6 in 2003. Find the average rate of change in the number of public library visits from 1998 to 2003.

Answer 1

ANSWER:

The average rate of change between 1993 and 2003 was 0.04 billion visits per year

STEP-BY-STEP EXPLANATION:

Since we have the amount for each year established, that is, for 1998 and 2003, the exchange rate would be the subtraction between both values, just like

$\begin{gathered} 1.6\cdot10^9-1.4\cdot10^9=0.2\cdot10^9\text{ in 2 years } \\ \text{therefore, per year would be} \\ \frac{0.2\cdot10^9}{5}=0.04\cdot10^9\text{ visits per year} \end{gathered}$