Four points are labeled on the graph below. Calculate the ratio of rise to run for each of the following pairs of points: A. From A to B From B to C From A to C From C to D B. How can you account for the fact that the numbers you calculated in part A are not all the same? Slope The ratio of rise to run, runrise, is constant for straight-line graphs. It docs not matter which points along the line are chosen to compute the ratio. For a straight-line graph, the ratio of rise to run is called the slope of the graph. This one numbicr applies to the entire line. The slope of a straight-line graph usually has an important interpretation in terms of the physical system represented on the graph