A traffic study was conducted on a busy street. In 15-minute intervals from 6:30 a. m. to 8:00 a. m., the number of vehides that passed a certain point in one minute was recorded in the table
below. Write an equation for the curve of best fit, then approximate the number of cars that passed
the point at 9:15 a. m.
90
X 0 15 30 45 60
y
32 48 71 80 98
75
86
81