TWO QUESTIONS! PLEASE HELP!

What is the slope of the hypotenuses of the triangles in simplest form? (first pic) The answer is 1/3...right?

Match each pair of points with the coordinate that will make a right triangle with its hypotenuse along the graph shown.(second pic)

Column A

1. (1, 2) and (2, 4)

2. (2, 4) and (3, 6)

3. (2, 4) and (4, 8)

4. (1, 2) and (3, 6)

Column B

A. (3, 2)

B. (3, 4)

C. (5, 6)

D. (2, 2)

E. (4, 4)