Identifying Proportional Relationships in Written Descriptions

What is the equation?

• y=4

• y=1.5x

• y=1.05

• y=1.05x

Is the given table a proportional relationship? If so, what is the constant?

• Yes; 1/3

• Yes; 3

• Yes; 5

• No

Write an equation for this relationship.

• y=1/5x

• y=1/2x

• y=2x

• y=5x

Does this equation represent a proportional relationship?

• Yes

• No

Is the graph proportional or non proportional?

• Proportional because it is a straight line and passes through the origin (0,0).

• Non-Proportional because it doesn't pass through the origin (0,0).

What are the main characteristics of a proportional relationship between two variables?

• They pass through the origin.

• They are linear (straight line) and also pass through the origin.

• They are curved

• The x to y ratio is a constant of proportionality.

Does the graph show a proportional relationship?

• Yes

• No

Which of these could be a constant of proportionality.

• 20

• 40

• 2

• 80

What makes a graph proportional?

• Linear

• The line goes through the origin

• Curvy line

• Linear and the line goes through the origin

Does the table show a proportional relationship?

• Yes

• No