A company ordered 10 boxed lunches from a deli for $74.50.each boxed lunch cost the same amount.which equation represents the proportional relationship between y, the total cost of the nixed lunches and x, the number of boxed lunches?
A) 7.45x = y
B) 7.45/x = 10/y
C) 74.50x = y
D) 74.50/x =10/y