Plug in these values to the slope formula to find the slope. It is based on the slope. Thus if riserun 002 and the run is 150 the rise in feet is actually a drop.
Examine the equation for the line which Excel is now displaying overlaid on the scatter plot.
Percent slope 100 riserun. First solve for the slope in decimal terms bearing in mind that percent is just 100 times the original number. Subtract the values in parentheses to get 2-5. Select the Label drop-down and select Use Equation.