Proportion/Slope Intercept

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

• They pass through the origin.
• They are linear and also pass through the origin.
• They are linear

• The line does not curve

Does the equation show a proportional relationship?

• Yes
• No

Does the equation show a proportional relationship?

• Yes
• No

Does the table show a proportional relationship?

• Yes
• No

Which statement best describes the relationship of x and y in the table?

• Proportional
• Not Proportional

Does the graph show a proportional relationship?

• Yes
• No

Which is the best explanation of why this graph shows a non-proportional relationship?

• The line is not straight.

• The line does not touch the origin.

• The line is at the wrong angle.

• The graph shows a proportional relationship.

Is the graph shown proportional or non-proportional? Explain how you know.

• proportional because it goes to the origin

• non-proportional because it doesn't go to the origin

• non-proportional because it is not a straight line

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).

• y=-3x+1

• y=3x+1

• y=1/3x+1

• y=-1/3x-1