Linear word problem

Question

The function C(d) = 8d + 2 represents the cost to order a Box of d including the flat rate shipping charge.

What is the cost per box of donuts?

How much is the flat rate shipping charge?

How much will the total cost be to order 3 boxes of donuts?

Answer 1

The cost per box of donuts is $8 (the slope of the function).

The flat rate shopping charge is $2 (the y-intercept of the function).

The cost of 3 boxes of donuts is:

C(3) = 8×(3) + 2 = 24 + 2 = $26.00