To determine the rate of change in the average waiting time between March and April, follow these steps:
1. Identify the average waiting time for March and April from the given data.
- March: 31 minutes
- April: 46 minutes
2. Calculate the difference in the waiting times between April and March. This can be done by subtracting the average waiting time in March from the average waiting time in April.
[tex]\[
46\, \text{minutes} - 31\, \text{minutes}
\][/tex]
3. Perform the subtraction:
[tex]\[
46 - 31 = 15\, \text{minutes}
\][/tex]
Therefore, the rate of change in the average waiting time between March and April is [tex]\(15\)[/tex] minutes per month.
