You Will Need
 Graph paper
 A pencil
 Basic math skills
Steps

Step 1
Graph the line whose slope you are measuring
Use graph paper to graph the line whose slope you are measuring. Draw the line on standard xand yaxis.

Step 2
Select two points on the line
Select two points on the line. Calculate where each point falls on the x and yaxis to determine the exact points.

Step 3
Subtract the yaxis locations of the two points
Subtract the yaxis location of the first point from the yaxis location of the second point. The difference is called the "rise."

Step 4
Subtract the xaxis locations of the two points
Subtract the xaxis location of the first point from the xaxis location of the second point. This difference is called the "run."

Step 5
Divide the rise by the run to find the slope
Divide the rise in the yaxis by the run in the xaxis to find the slope of your line, an exact measurement of just how steep it is.