The table below models the cost, y, of using a high-
efficiency washing machine and a standard was
machine over x number of years.
Which equation represents the cost of the high-
efficiency washing machine over a given number of
years?
Which equation represents the cost of the standard
washing machine over a given number of years?
-
Number of
Years
High-
Efficiency
Cost ($)
Standard
Cost ($)
on
After how many years of use would the washing
machines cost the same amount?
Which washing machine would be the more practical
purchase if kept for 9 years?