# Mathss

posted by .

Item 20
A bathtub is draining at a constant rate. After 2 minutes, it holds 28 gallons of water. Three minutes later, it holds 7 gallons of water. Write an equation that represents the number y of gallons of water in the tub after x minutes.

• Mathss -

we have two data points: (2,28) and (5,7)
so, the slope of the line is (7-28)/(5-2) = -7

Using the point-slope form of a line, the function is

y-28 = -7(x-2)
or
y = 42-7x

## Similar Questions

1. ### math

Water is Pumped into an underground tank at a constant rate of 8 gallons per minute.Water leaks out of the tank at the rate of (t+1)^½ gallons per minute, for 0<t<120 minutes. At time t=0, the tank contains 30 gallons of water. …

You have 2 pails. One holds 4 gallons and the other holds 7 gallons. How can you go to the lake and bring back exactly 5 gallons of water?
3. ### algebra

a barrel contains 163 gallons of water and is being drained at a constant rate of gallons per hour write an equation that models the number of gallons g after t hours
4. ### math

A barrel contains 163 gallons of paint and is being drained at a constant rate of 12 gallons per minute Write an equation that models the number of gallons, g, after t minutes The equation that models the given situation is
5. ### math

A barrel contains 163 gallons of paint and is being drained at a constant rate of 12 gallons per minute Write an equation that models the number of gallons, g, after t minutes The equation that models the given situation is
6. ### math 116

Someone please help me with this quesion. A barrel contains 192 gallons of paint and is being drained at a constant rate of 11 gallons per minute. Write an equation that number of gallons,g,after t minutes. The equation that models …
7. ### math

a tub takes 4 minutes to fill and holds 28 gallons of water. At this rate, how long would it take to fill a bathtub that held 63 gallons of water?
8. ### Math

A swimming pool is filled with water at a constant rate of 9 gallons every 10 minutes. After 30 minutes, the pool is filled with 55 gallons of water. Which equation represents this relationship ?
9. ### algebra

Susan is filling two ponds in her back yard. She has to dig the hole, put the liner in, and fill the pond. The first pond holds 75 gallons of water and is filling at a rate of 7 gallons of water per hour. The second holds 115 gallons …
10. ### algebra

a bathtub in your home has a drain that leaks. When you fill you bathtub with 30 gallons of water you notice that after every 5 minutes you only have 20 gallons remaining, so the drain is leaking 2 gallons every minute which represents …

More Similar Questions