Question

Yani buys a certain brand of cereal that costs $10 per box. Yani 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 = 7x Part A: How many more dollars is the price of a box of Yani's original brand of cereal than the price of a box of the super-saving cereal? Show your work. Part B: How much money does Yani save each month with the change in cereal brand if he buys 5 cereal boxes each month? Show your work. (10 points)

Answer 1

A: $3; B: $15

Explanation:

Cost of Yani's original cereal: $10/box

Cost of super-saving brand: $7/box (as given by the 7 in y=7x)

A: Difference = 10-7 = 3

B: 5 boxes of original brand = 5×10 = $50

5 boxes of super-saving brand = 5×7 = 35

Savings = 50-35 = $15