Answer:
55
Step-by-step explanation:
Step 1: Divide each mile he drove by the hours:
110 ÷ 2
[tex]\frac{110}{2}[/tex]
= 55
275 ÷ 5
[tex]\frac{275}{5}[/tex]
= 55
Note - the next step is not necessary in this case even though it asked for the average because if both results are the same, then that is the answer.
Step 2: Find the average of the two results:
[tex]\frac{55+55}{2}[/tex]
[tex]\frac{110}{2}[/tex]
= 55
Therefore, the average rate of change is 55 miles per hour.