Assume that this situation represents a linear function. Find and interpret the slope of the line that models the data. A scuba diver descends to the bottom of a lake. After 20 seconds, the diver is 195 feet from the bottom of the lake, and after 4 minutes, the diver is just 9 feet from the bottom.

If time is measured in seconds, then Slope:

If time is measured in minutes, then Slope:

The slope indicates:

• the total amount of time (minutes or seconds) that the diver spends descending to the bottom of the lake
• the number of feet that the diver is descending for each unit of time (minute or second)
• the total number of feet that the diver has descended