Essay
For a compact car, a car-rental company charges $28.50 per day plus $0.15 per mile. For a one-day rental, let x denote the number of miles driven and let y denote the total cost. Obtain the equation that expresses y in terms of x. Construct a table of values using the x-values 70, 140, and 220 miles. Draw the graph of the equation by plotting the points from the table and connecting them with a straight line. Use the graph to estimate visually the cost of driving the car 190 miles. 
Correct Answer:
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y = 28.50 + 0.15x 
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