What is the constant of variation in the area formula A = pir^2A=πr2? Precalculus Power Functions and Variation Modeling with Power Functions 1 Answer Konstantinos Michailidis Sep 13, 2015 It is piπ Answer link Related questions What is meant by the phrase constant of proportion? What is the constant of variation in the circumference formula C = 2pirC=2πr? What is a monomial function? The heat experienced by a hiker at a campfire is proportional to the amount of wood on the fire,... How do you solve 5^(x^2) = 25/(5^x)5x2=255x? See all questions in Modeling with Power Functions Impact of this question 3605 views around the world You can reuse this answer Creative Commons License