Question

the graph shows the depth of water in a bathtub as water drains out. what does the slope of the graph represent?
water draining from bathtub
options:

• the depth in inches of the water in the bathtub
• the time in minutes needed to drain y inches of water
• the change in the depth of the water per minute
• the time in minutes needed to drain the bathtub completely

Explanation:

The slope of a graph represents the rate of change of the y-axis variable with respect to the x-axis variable. Here, the y-axis is water depth (inches) and the x-axis is time (minutes), so the slope is the change in depth per minute.

Answer:

the change in the depth of the water per minute