A linear function is a straight line. Therefore, the answer is #2.
498 is approximately 500
12 is approximately 10
500/10 = 50
So, 498/12 is approximately 50.
If 1/10 of the tank is filled in 1/5 of an hour, then multiplying both of those by 5 you would get 5/10 of a tank being filled in a full hour, or answer choice A. Hope this helps! By the way, sorry for the incorrect answer a couple years ago :)
