Constant of Proportionality Tables & Graphs

What is the formula for a proportional relationship?

• y=kx

• y=k/x

• z=ykx

• y=ky

If the constant of proportionality is 10, which of the following is the correct proportional equation?

• 10=kx

• 10=k

• y=10k

• y=10x

Write an equation for this relationship.

• y=1/5x

• y=1/2x

• y=2x

• y=5x

Which equation matches the graph?

• y = 8x

• y = 1x

• y = 3x

• y = 16x

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

• $200 is earned after working 3 hours

In the equation y = 14x, what is the constant of proportionality?

• y

• x

• 14

What is the constant of proportionality for this table?

• 8

• 3

• 1/9

• 9

Is this graph proportional?

• Yes

• No

• Sometimes

• Both

Identify the constant of proportionality.

• k = 5

• k = 1/5

• k = 1

• k = 2.5

• none (not proportional)

Identify the constant of proportionality.

• k = 25

• k = 50

• k = 100

• k = 1/50

• none (not proportional)