recorded the length of time,by minutes, taken to travel to work when leaving home x minutes after 7am on seven(7) selected mornings. following analysis of the records, a linear relationship between...

recorded the length of time,by minutes, taken to travel to work when leaving home x minutes after 7am on seven(7) selected mornings. following analysis of the records, a linear relationship between the two(2) variables was defined as y=18.5 + 0.5643x. the sbo needs to arrive at work no later than 8:40 am. if the number of minutes by which the sbo arrive early at work, when leaving home x minutes after 7am is donated z