Identifying and Graphing Proportional Relationships

Why does this graph show a non-proportional relationship?

• It doesn't, it is proportional because it is a straight line

• It goes through the origin

• It does not go through the origin

• It is a straight line

Is the graph proportional or non proportional?

• Proportional

• Non-Proportional

Which graph is non-proportional?

• A

• B

• C

• D

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

• Proportional

• Not Proportional

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.

Using the graph above, determine the constant of proportionality.

• 0

• 1

• 3

• 6

Which of the following rates of change represents the graph shown?

• 2 boys for every 1 girl

• 0.5 boys for every 1 girl

• 6 boys for every 1 girl

• 3 boys for every 1 girl

Which equation shows how much rain falls per hour?

• y = 2x

• y = 3x + 1

• y = -2x

• y = -3x + 1

Does this graph represent a proportional relationship?

• Yes

• No

What are the identifying features of a proportional relationship graph?

• The graph is a curvy line

• The line goes through the origin (0,0)

• The line does not cross the y-axis

• The line does not go through Quadrant 4

• The graph is a straight line