Explanation: The initial volume of the pond is 200 gallons, so that is the y-intercept and included in the equation. The rate of 17 gal/min is written as 17t if t = time. The full equations is 17t + 200.
To find when the pond will fill up you simply make 1781 equal to the equation: 1781 = 17t + 200 Then solve for t: 1781 – 200 = 17t + 200 – 200 1581 = 17t 1581 ÷ 17 = 17t ÷ 17 93 = t
