Cell phone company x charges $15 dollars for 120 minutes. cell phone company y charges $25.95 for 300 minuets. which company has the better per minute rate

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.