pls answer asap!! will give brainliest:)))))

Answer:
1st one
Step-by-step explanation:
if you try out 710 divided by 7 times 3 it doesn't equal 390 dollars, so you're not getting a fair price and you're paying extra, whereas you know on the first one that if you double 360 by 2 it equals 720 so it is a linear pricing