Mike Cisneros takes us through slopegraphs:
When we use slopegraphs, we are trying to show one specific thing: is the value in the first column higher, lower, or the same as the value in the second column? That change is easy to see when we connect those values with lines, because the lines will slope up or down, in the direction of the change.
The steeper the slope, the bigger the change; and, if one thing is going up more dramatically than its neighbors, a slopegraph will make that easier to see than a traditional line graph would.
Mike has some examples of where slopegraphs make sense as well as cases when they don’t.