Income Graphs

FIRST has potential for more teams at higher income, though it generally forms more of a funnel shape than a line. There doesn't seem to be a clear peak.

VEX seems to peak around 60-80K for average income. This also forms a somewhat funnel shape in that greater income has the potential for greater teams.

Overall Income Analysis

While income doesn't seem to be directly coorelated with the number of robotics teams, VEX seems to peak at a mid-range income of 60-80K while FIRST continues to increase at higher incomes.