Lynn wants to predict how much fuel her car will use based on its speed. She drove her car 100\,\text{km}100km100, start text, k, m, end text at each of the speeds below, and she measured how much fuel was used at each speed. Her data is summarized in the table below. Speed (km/hour) 202020 404040 606060 808080 100100100 120120120 Fuel used (liters) 13.013.013, point, 0 8.08.08, point, 0 5.95.95, point, 9 7.07.07, point, 0 8.38.38, point, 3 9.99.99, point, 9