Jamilla was moving to a new city She researched the rates charged by the local utility company for water She found the listing of charges below She expects that her family may use up to 1 000 cubic feet of water each month 12 70 monthly service fee First 300 cubic feet of water used 3 90 per 100 cubic feet or fraction thereof After the first 300 cubic feet 5 20 per 100 cubic feet or fraction thereof a Sketch a graph of the cost of Jamilla s possible water usage in one month Be sure to consider what the cost would be for partial units such as 220 or 675 cubic feet of water Hint a This will be a step graph What is the cost if no water is used but there is service More Help a When sketching this graph note that the price jumps from 3 90 to 5 20 after 300 cubic feet of water is used b Is this graph a function Why or why not CHint b c What are the domain and range of this graph