Identify Proportional Equations

Which best describes the equation?
y = 75x

• Proportional

• Nonproportional

Which of the equations below is proportional?

• y = 6x

• y = 3x + 2

• y = 2x + 4

• y = -2x -1

Proportional or Nonproportional?

• Proportional

• Nonproportional

What makes a graph proportional?

• Linear

• The line is only in quadrant 1

• Curvy line

• Straight line and the line goes through the origin

Which equation shows a proportional relationship between x and y? (a)  

• y = 3x + 9

• y = 1/2x

• y = 1/2x - 2

• y = x2

Is this a proportional equation?  Why?

• It is not proportional because it doesn't have a constant.

• It is not proportional because it doesn't have a constant rate of change.

• It is proportional because if x = 0, y = 0.

• It is proportional because it has a y intercept of 22.

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

• Yes; 1/3

• Yes; 3

• Yes; 5

• No

Does the table represent a proportional relationship?

Does the table represent a proportional relationship?

• Yes.

• No.

Does the graph represents a proportional or a non-proportional relationship?

• Proportional Relationship

• Non-Proportional Relationship