Answer:
what exactly is the question to the problem ? it looks like it's already solved ? are you suppose to find something or ?
I believe 4 people would get 7.5 part of of it
1- y= x/2 + 2
2- y= 3x +1
3- y= x/2 - 2
4- y= 3x - 1
For this case we must find the slope of the following equation:

By definition, the point-slope equation of a line is given by:

Where:
: It is a point through which the line passes
m: It's the slope
So, the slope of the given equation is:

Answer:
Option D
The answer to your question is B .