Answer:
2
Step-by-step explanation:
slope formula :
where the x and y values are derived from known points
We are given the points (3,1)and (4,3)
Given these points we can define our variables
(x1,y1) = (3,1) so x1 = 3 and y1 = 1
(x2,y2) = (4,3) so x2 = 4 and y2 = 3
Now that we have defined our variable, we plug them into the formula
Recall formula: 
x1 = 3 , y1 = 1 , x2 = 4 , y2 = 3
* plug in values *

subtract 3 and 1 , and 4 and 3

the slope is 2