The slope is the rate of change which is 2.70 in this case. This means that a passenger will be charged 2.70 for every x mile driven added to the starting fee of 1.95. The following equation can be derived in slope-intercept form:
y=2.70x+1.95, where y = total cost, x = number of miles, 2.70 is the rate of change (slope), and 1.95 is the starting fee (y-intercept).