Agrocery store sells 6 bottles of water for $4 and 18 bottles of water for $10. is the cost of the water proportional to the number sold? explain.

Abicycle training wheel has a radius of 3 inches. the bicycle wheel has a radius of 10 inches.approximately how much smaller, in square inches and rounded to the nearest hundredth, is the area of the training wheel than the area of the regular wheel? *