Ireally don't understand this. would someone send me on how to do this along with the answers?

The slope of a line on a graph is

               (change in 'y') divided by (change in 'x')

in the same direction along any piece of the line.

Look at either one of the triangles.  It doesn't matter which one.
You only need to use one of them to find the slope.

Bigger triangle:
change in 'y' = 2
change in 'x' = 6          slope = 2/6  =  1/3

Smaller triangle:
change in 'y' = 1
change in 'x' = 3          slope = 1/3