Answer:
A. David's sprinkler uses less water per minute. The slope on the graph is 2, which means the sprinkler uses 2 gallons per minute.Step-by-step explanation:
Given that :
Amount of water used by George's sprinkler per minute = 6 gallons per minute.
For David, we have been given a graph.
From it, we can calculate the water used per minute by calculating the slope.
The slope is given by :
m = (y2 - y1)/(x2 - x1)
Here (x1, y1) and (x2, y2) are two points on the graph. Say, (x1, y1) = (0, 0) and (x2, y2) = (5, 10)
So, m = (10 - 0) /(5 - 0) = 2
So, amount of water used by David's sprinkler per minute = 2 gallons per minute.
Thus, the correct answer is :
A. David's sprinkler uses less water per minute. The slope on the graph is 2, which means the sprinkler uses 2 gallons per minute.