Luke buys a certain brand of cereal that costs $10 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 price of a box of Luke's original brand of cereal than the 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 5 cereal boxes each month? Show your work. (10 points)
Part A:
The price of a box of Luke's original brand of cereal is $10.
The price of a box of the super-saving brand is $9.
To find out how many more dollars the price of Luke's original brand is than the price of the super-saving brand, we subtract the price of the super-saving brand from the price of the original brand:
$10 - $9 = $1
Part B:
Luke buys 5 cereal boxes each month.
The price of each box of the super-saving brand is $9.
So, Luke saves $1 with each box of cereal he buys.
To find out how much money Luke saves each month, we multiply the number of cereal boxes he buys each month by the amount he saves with each box:
$1/saving * 5 boxes = $5