a pool is being drained and has 486 gallons of water at 2: 00 pm. after 10 minutes, the pool has 466 gallons of water. at 2: 30 pm, 30 minutes later, the pool has 426 gallons of water. write a linear equation to model the relationship between the number of gallons of water (g) in the pool and the time t, in minutes. predict how many gallons of water the pool will have at 2: 50.