Barbara buys a box of pens for $4. For every additional box she buys, she gets a $1 discount. Which expression represents the total cost of the pens, c, as a function of the number of boxes, b?

A. c=f (b) = 4b-1

B. c=f (b) = 4b+1

C. c=f (b) = 3b+4

D. c=f (b) = 4b+3

E. c=f (b) = 4+3 (b-1)

Question

Paulina Stafford

1 September, 18:00

+1

Answers (1)

Know the Answer?

Jeffrey Phillips · Answer 1

This is linear ...

c (b) = 4b - (b-1)

c (b) = 4b-b+1

c (b) = 3b+1

which is equal to E. 4+3 (b-1)

Barbara buys a box of pens for $4. For every additional box she buys, she gets a $1 discount. Which expression represents the total cost of the pens, c, as a function of the number of boxes, b?A. c=f (b) = 4b-1B. c=f (b) = 4b+1C. c=f (b) = 3b+4D. c=f (b) = 4b+3E. c=f (b) = 4+3 (b-1)