MSA Inv. 1.4

MSA Inv. 1.4

Linear Relationships

Focus Question:

#1 How can you tell if a linear relationship is increasing or decreasing?

Open Ended

What does it mean to be a linear relationship? Recall anything you know!

NO NEW VOCABULARY

#2 In a table

• look to see if y values are going up (increasing) or going down in value (decreasing)

Multiple Choice

Increasing or decreasing?

• decreasing

• increasing

Real life- increasing or decreasing?

Tom works at an aquarium shop on Saturdays. One Saturday, when Tom gets to work, he is asked to clean a 175-gallon reef tank. His first job is to drain the tank. He puts a hose into the tank and starts a siphon. Tom wonders if the tank will finish draining before he leaves work. He measures the amount of water that is draining out and finds that 12.5 gallons drain out in 30 minutes. So, he figures that the rate is 25 gallons per hour. To see when the tank will be empty, Tom makes a table and draws a graph.

Multiple Choice

Increasing or decreasing?

• increasing

• decreasing

#3 In an equation

y=mx+b

Multiple Choice

• increasing

• decreasing

Multiple Choice

• increasing

• decreasing

#4 In a table

Multiple Choice

Is this linear relationship increasing or decreasing?

• Decreasing

• Increasing

Multiple Choice

Is this linear relationship increasing or decreasing?

• Decreasing

• Increasing