Understanding Direct Variation and Slope

The video tutorial covers solving word problems related to the slope of a line, specifically using direct variation models. It begins with an introduction to the concept of slope and direct variation, followed by setting up equations for practical problems like filling a bathtub and a swimming pool. The tutorial includes graphing these models and solving them algebraically to find the time required to fill the containers. The video emphasizes understanding the relationship between variables and using algebraic manipulation to solve real-world problems.

What is the main focus of the word problems discussed in the video?

• Calculating the area of a circle

• Understanding the slope of a line

• Finding the volume of a cylinder

• Determining the perimeter of a square

Tags

CCSS.HSF-LE.A.1B

What is the rate of water flow for the low-flow showerhead mentioned in the problem?

• 3.0 gallons per minute

• 2.5 gallons per minute

• 1.5 gallons per minute

• 4.0 gallons per minute

Tags

CCSS.8.EE.B.5

In the bathtub problem, what does the variable 'm' represent?

• Gallons of water

• Minutes

• Liters of water

• Hours

Tags

CCSS.8.EE.B.5

What is the slope of the line in the bathtub problem's graph?

• 1.5

• 3.0

• 2.0

• 2.5

Tags

CCSS.HSA.CED.A.1

How long does it take to fill a 30-gallon bathtub using the showerhead?

• 8 minutes

• 10 minutes

• 15 minutes

• 12 minutes

At what time does Amen start filling his swimming pool?

• 6 AM

• 10 PM

• 12 AM

• 8 PM

Tags

CCSS.3.NF.A.1

CCSS.3.NF.A.2B

How full is the swimming pool at 6 AM?

• 1/2 full

• 3/4 full

• 4/7 full

• 5/7 full

Tags

CCSS.8.EE.C.7B

What is the rate at which the swimming pool fills per hour?

• 1/10

• 1/14

• 1/7

• 1/8

Tags

CCSS.HSF.LE.A.4

How many hours does it take to completely fill the swimming pool?

• 14 hours

• 12 hours

• 16 hours

• 10 hours

At what time will the swimming pool be completely full?

• 2 PM

• 4 PM

• 12 PM

• 10 AM