Graphing Proportional Relationships (Part 1)

This lesson covers graphing proportional relationships, starting with a review of ratios and proportions. It uses examples like the cost of bananas to explain equivalent ratios and unit rates. The lesson then demonstrates how to graph these relationships, showing that the points form a straight line. It concludes by identifying patterns in the graph and finding additional data points that maintain the proportional relationship.

What is a proportional relationship?

• A comparison of three quantities

• Two ratios that are equal

• A comparison of different units

• A single ratio

If 4 bananas cost $2, how much would 8 bananas cost in a proportional relationship?

• $8

• $6

• $2

• $4

What is the unit rate of the given proportional relationship involving bananas?

• $0.75 per banana

• $1.00 per banana

• $0.25 per banana

• $0.50 per banana

Which of the following ordered pairs would fit the graph of the given proportional relationship?

• (7, 4)

• (6, 3)

• (5, 2.5)

• (3, 2)

What pattern is observed in the graph of the proportional relationship?

• The points form a straight line

• The points form a curve

• The points are scattered randomly

• The points form a zigzag line