The data show Mark’s commute times, in minutes, based on how many minutes after 7:00 A.M. he leaves his home. Use the points (1, 24) and (15, 17) to write an equation for the line of fit in slope-intercept form, where x is the number of minutes after 7:00 A.M. and y is the commute time, in minutes. If the trend continues, what would be the approximate commute time if Mark leaves at 7:18 A.M.?







Minutes after 7:00 A.M. 1 2 4 4 6 8 10 12 14 15




Commute Time (min) 24 22 24 20 22 19 22 19 15 17


The line of best fit is y =



If the trend continues, the approximate commute time if Mark leaves at 7:18 A.M. is [blank] minutes.