Tickets to play cost $11 each there's also a service charge of four dollars per per order right now equation for the relationship that gives the total cost y in dollars for another order of x tickets

Johnny rode his bike to a friends house 4 blocks down the street in his neighborhood. he immediately rode back home once he realized his friend was unable to play. what was his displacement for the total bike ride trip? what could you use as a reference point ? show the steps to solve this problem.