Interpreting Slope and y-intercept

Interpreting Slope and y-intercept

Practice Given a Graph

The Bath Tub

Billy Bob has an ancient bathtub that drains slower than the dickens. He filled up his tub and then let the water drain out to see how long it would take to drain. The graph below represents the number of gallons of water remaining in the tub and the time in minutes.

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How many gallons of water are in Blilly Bob's tub after 6 minutes?

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What is the slope of the line?

Open Ended

What do the numbers in the slope represent in the context of the problem?

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What is the x-intercept?

Open Ended

What do the values (x,y) of the x-intercept mean in the context of the problem?

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What is the y-intercept?

Open Ended

What do the values (x,y) of the y-intercept mean in the context of the problem?

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Write an equation to represent the situation.

Practice Given an Equation

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The cost to rent a car is $50 plus $0.10 per mile. Identify the slope.

Open Ended

The cost to rent a car is $50 plus $0.10 per mile. Interpret the slope.

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The cost to rent a car is $50 plus $0.10 per mile. Identify the y-intercept.

Open Ended

The cost to rent a car is $50 plus $0.10 per mile. Interpret the y-intercept.

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The cost to rent a car is $50 plus $0.10 per mile. Write an equation to represent the situation.

Time to practice on your own!