The table and Graph below represent a pool being drained of its water. It shows the amount of water left in the pool every hour.
0
1
2
3
4
Time (hours)
Water Remaining
(gallons)
0) 15,000
1) 14,400
2) 13,800
3) 13,200
4) 12,600
Write an equation that represents the relationship between the time and elapsed and the number of gallons of water remaining in the pool.