Mr. Buffington introduces proportional relationships, explaining their consistent rate of change and representation through equivalent ratios, tables, graphs, and equations. He defines slope as the rate of change and demonstrates its application in linear equations. The video compares different proportional relationships using graphs and equations, highlighting how to determine which has a greater slope and cost implications in practical scenarios.

What is a key characteristic of proportional relationships?

• They cannot be represented graphically.

• They have a constant rate of change.

• They have varying rates of change.

• They are always decreasing.

How can proportional relationships be expressed?

• Only through equations.

• Using equivalent ratios.

• Only through graphs.

• Only through tables.

Which of the following is an example of a proportional ratio?

• 6 to 12 and 8 to 16

• 6 to 12 and 7 to 14

• 6 to 12 and 5 to 10

• 6 to 12 and 3 to 6

What does the slope represent in a proportional relationship?

• The maximum value of a variable.

• The minimum value of a variable.

• The total distance covered.

• The rate of change between two variables.

In the equation y = 2x, what does the number 2 represent?

• The slope of the line.

• The y-intercept.

• The total distance.

• The x-intercept.

What is a characteristic of a graph representing a proportional relationship?

• It is a straight line.

• It is a curved line.

• It is a horizontal line.

• It has multiple peaks.

Which towing company has a greater slope in the comparison?

• Both have the same slope

• Blue Towing Company

• Neither has a slope

• Red Towing Company

What is the main takeaway from comparing proportional relationships?

• Graphs, tables, and equations are interchangeable for comparison.

• Only graphs can be used for comparison.

• Equations are the best way to compare.

• Tables are the only method for comparison.