Answer:
2
Step-by-step explanation:
To find slope by using 2 points, in this case B and C, use the following formula:
[tex]\frac{y2-y1}{x2-x1}[/tex]
x1 and y1 are the coordinates of the first point and x2 and y2 are the coordinates of the second point.
y = [tex]\frac{7-3}{3-1}[/tex]
y = [tex]\frac{4}{2}[/tex]
y = 2
The slope of line BC is 2.
