The equation for the cost after 2014 will be : Cost(x) = 8.50 + 0.8n
The cost of pass on 2014 = $8.50
Increase in cost per year = $0.80
The equation which represents the yearly cost starting from 2015 will be :
Cost in 2014 + (yearly increas × number of years after 2014)
Let the Number of years after 2014 = n
The equation thus becomes :
Cost(x) = 8.50 + 0.8n
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