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Example 12.3 from Statistics, 12.1 Linear Equations
Find the equation that expresses the total cost in terms of the number of hours required to complete the job.
Work it out on paper first. Then open the solution one step at a time, and stop as soon as you can finish on your own.
Let x = the number of hours it takes to get the job done.
Let y = the total cost to the customer.
The $31.50 is a fixed cost. If it takes x hours to complete the job, then (32)(x) is the cost of the word processing only. The total cost is y = 31.50 + 32x.
How did it go?