Question

An office supply store offers banner printing services. The store charges $4 to print each one-foot-long section of a banner that is three feet tall. Which graph represents the cost to print a three-foot-tall banner that is x feet long?

Answer 1

C, is the third graph.                                                              

Answer 2

The store charges $4 to print each one-foot-long section of a banner that is three feet tall. Let x be the length of three-foot-tall banner. Then:

1. for 0<x<1, the price is $4;

2. for 1≤x<2, the price is $(4+4)=$8;

3. for 2≤x<3, the price is $(8+4)=$12 and so on.

The graph that satisfies these conditions is C.

Answer: correct choice is C.