I WILL MARK YOU BRAINLYEST if you answer all of my problems !!!!!!!!!!!

i legit need a actual answer to 18 and 19 please

18# can the situation be modeled by a linear equation? explain
(time/minutes: 8 Water/gallons 155), (time/minutes: 10 Water/gallons 150), (time/minutes: 12 Water/gallons 145), (time/minutes: 14 Water/gallons 140), (time/minutes: 16 Water/gallons 135)

19# if possible write a linear model that represents the amount of water remaining in the tank as a function of time.