The median is the middle number in a sorted, ascending or descending, list of numbers and can be more descriptive of that data set than the average are median....
Y=-3/2L -2. At the Y axis, line L is at -2, so we add that as B or the Y intercept. We can see that the graph goes 2 over to the right and down three, which makes the slope negative and 3/2 (rise/run)