Aubrey and Charlie are driving to New York City. They have already traveled 20 mi, and they are driving at a constant rate of 50 mi/h. Complete the function that models the distance they drive as a function of time. function notation in slope-intercept form: f(x) = f(x)= 50x + 20 Use the function you wrote in to complete the following: f(1.5) = . The value indicates that after hours of driving, Aubrey and Charlie will have traveled miles.