The table below models the cost of using a high
efficiency washing machine and a standard washing
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 ($)
Standard
Cost($)
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?
1
525
430
2
550
460
575
490