Problema Solution
at 6:00 A.M., there were 800,000 gallons of water remaining in a reservoir.After 8 hours of irrigation, there were 100,000 gallons of water remaining.Find the rate of change in the number of gallons of water for the time the field was being irrigated.
Answer provided by our tutors
x = 6
y = 800,000
x=14
y = 700,000
y = ax + b
800000 = 6a + b
700000 = 14 a + b
b= 800000 - 6a
14a + 800000 - 6a = 700000
8a = -100000
a = -125,000
b = 700000 - 6a
b= 1,450,000
y = -125,000x + 1,450,000