Hi, it's a me, Mario! You see my little Goomba friend up there? I sure do like ground-pounding his mushroomy face into the dirt. Do you see the table with my impressive stats? Let's make a graph out of it and investigate slope.

As you can see from the graph my rate of stomping is INCREASING!

If the rate is INCREASING then the slope of the line that represents the rate is POSITIVE!

A positive slope will appear to go up from left to right.

Goombas stomped per minute is a proportional relationship.