Luke buys a certain brand of cereal that costs $11 per box. Luke changes to a super-saving brand of the same size. The equation shows the price, y, as a function of the number of boxes, x, for the new brand.

y= 9x

Part A: How many more dollars is the is price of a box of Luke's original brand of cereal than the a price of a box of the
super-saving brand? Show your work.

Part B: How much money does Luke save each month with the change in cereal brand if he buys 6 cereal boxes
each month? Show your work.