Question

A city water company charges homeowners based on how much water they use in thousands of gallons. The company progressively charges at a higher rate the more water that is used Based on the graph at the above how much does the city charged when a home owner uses the following number of gallons of water: ​

Answer 1

• 1700: $50
• 2000: $60
• 7000: $90

Explanation:

You can read the answers from the graph. Find the usage on the horizontal scale, and look at the vertical scale to find the corresponding charge.

__

1700 gallons

The value 1700 is between 1000 and 2000, so will be between 1 and 2 on the horizontal scale. The graph is flat in that region. The charge is $50.

__

2000 gallons

The graph has a jump at 2 on the horizontal scale. The solid dot tells you that the charge is $60.

__

7000 gallons

At 7 on the horizontal scale, the graph is increasing from 80 to 100. At 7000 gallons, the line passes through the grid intersection indicating the charge is $90.