The function 
is a line. As such, its domain and range is the whole real number set 
, and it has no horizontal nor vertical asymptotes.
Moreover, there's no constant term, so it's x and y intercept is the origin (0,0).
B, y=3x-2. It’s a positive line, so it can’t be C. The line intersects the y axis at -2 so we know it’s either B or D. If you count the points the line runs through, you can see it rises 3 points and only runs 1. That means the slope is 3/1 which equals 3. B’s slope is 3, so you have your answer!
Step-by-step explanation:
The cost increase is:
(4 - 3) / 3 × 100%
33%
The answer is none of these.
