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Solution:
Average time per line = total time / total lines
Average time per line = (3x^2 + 2)/(x + 4)
Average time per line = 3x - 12 + (3x^2 + 2)/50 milliseconds
Since y=k, there is a slope of zero, which is just a horizontal line k units from the x-axis. In this case k=-5, so the graph of y=-5 is a horizontal line 5 units below the x-axis...
I believe that the ending answer you are looking for is 1320 miles with no gallons of gas because if you have 440 miles with 20 gallons of gas just do 440+440+440=1,320
