Find the Average Rate of Change Illustrated in the Graph

question 500

Multiple Choice

Find the average rate of change illustrated in the graph.
-A deep sea diving bell is being lowered at a constant rate. After 8 minutes, the bell is at a depth of 400 ft. After 45 minutes the bell is at a depth of 1800 ft. What is the average rate of change of depth?
Round to one decimal place.

• A) 40.0 ft per minute
• B) 31.1 ft per minute
• C) 37.8 ft per minute
• D) 0.03 ft per minute