The cost of 5.5 pounds of apples is $40.81 what is the constant proportionality that relates the cost in dollars Y to the number of pounds of apples X

Thomas works for a company that occupies a large campus every workday he orders a cup of coffee on campus and the $1.50 cost is automatically deducted from his paycheck. if thomas visits the coffee shop 13 times what will the net change in his paycheck be