Last question! Any explanation is appreciated, sorry for bad quality

Answer:
1/2
Step-by-step explanation:
When you have two points you need to use the slope formula:
[tex]m=\frac{y_{2}-y_{1} }{x_{2}-x_1}[/tex]
x1 and y1 is the first point and x2 and y2 is the second point, remember that the first number is X and the other is Y so...
[tex]m=\frac{5-4}{3-1} \\m=\frac{1}{2}[/tex]
1/2 is the slope of the points