Question

At the gas station, each liter of gas costs $3 but there's a promotion that for every beverage you purchase you save $0.20 on gas. Is your total savings on gas proportional to the number of beverages you purchase?

Answer 1

Yes!

For every beverage you buy, you get $0.20 off on gas.

Say you bought 5 beverages, you instantly save $1.00 on gas.

So yes!