Find the Constant of Proportionality Graph

What makes a graph proportional?

• Straight line

• The line goes through the origin

• Curvy line

• Straight line and the line goes through the origin

Determine the constant of proportionality for the table. Express your answer as y = kx

• y = 1/2x

• x = 1/2y

• y = 2x

• k = x

What was Brian's unit rate?

• 3/2 word per minute

• 30 minutes per word

• 60 minutes per word

• 30 words per minute

Which statement below accurately represents the graph?

• $100 is earned for each hour worked

• $200 earned for every 2 hours worked
  is the unit rate

• $500 is earned for every 8 hours worked

• $300 is earned after working 4 hours

Write an equation for this relationship.

• y=18x

• y=18.50x

• y=22.50x

• y=22x

Which graph is proportional?

• A

• B

• None of the graphs

• All of the graphs are proportional

Write an equation for this situation.

• y=9.75x

• y=19x

• y=19.25x

• y=9.5x

In order for a graph to represent a direct variation the line must be straight and go through the _________.

• y-axis

• origin

• x-axis

• 1st quadrant

What is the constant of proportionality?

• 2 swings / 1 day

• 0.5 swings / 1 day

• 4 swings / 1 day

• None of the above

Identify the constant of proportionality.

• k = 2

• k = 3

• k = 1.50

• k = 2/3

• none (not proportional)