On a 40 minute bike ride the bicycle wheels revolve 2400 times. what is the constant of proportionality? (a.) 0.016 revolutions per minute; the cons of proportionality is 0.016.(b.) 20 revolutions per minute; the constant of proportionality is 20.(c.) 40 revolutions per minute; the constant of proportionality is 40.(d.) 60 revolutions per minute; the constant of proportionality is 60.