Question

The Hydro water department has a monthly service charge of $11.90 and a volume charge of $1.26 for every 100 cubic feet of water.

The total monthly cost is equal to the service charge plus the charge for the volume used during the month. If we let x represent the number of cubic feet of water (in hundreds) and y represent the total monthly cost, then we have:
total monthly cost = volume charge + service charge
y = 1.26x + 11.90

If the Johnson family used 300 ft3 more water this month than last month, then they can expect


a. an increase in their water bill of $35.70.
b. a dec

Answer 1

If they use 300 cubic feet more and each cubic foot costs $1.26 then they should expect an increase of 3 times $1.26