Question

For the linear model, y = -67.9x + 679 , the distance, in miles y, is a function of time, x, in hours. Use the model to calculate the total distance, in miles, at x = 5 hours.

9.9 miles
339.5 miles
1,018.5 miles
cannot be determined

Answer 1

y = -67.9(5) + 679 = -339.5 + 679 = 339.5 miles.