Technician a says that diesel vehicles usually have two fuel pumps, a lift pump and a high pressure injection pump.
technician b says that diesel fuel pumps operate at a maximum of 140 psi to prevent spark knock.
who is correct?
both technicians a and b
technician a only
neither technician a nor b
technician b only

Aretha wanted to gather data about the cost of local bowling leagues in her area. she plotted the data and determined that the average bowling league costs consist of a one-time registration fee and a monthly fee modeled by the equation y = 15x + 20. identify and interpret the y-intercept in this model. the y-intercept is 20. this is the cost per month. the y-intercept is 20. this is the cost of registration. the y-intercept is 15. this is the cost of registration. the y-intercept is 15. this is the cost per month.