Equations from Relationships

Write an equation for this relationship.

• y=1/5x

• y=1/2x

• y=2x

• y=5x

Identify the constant of proportionality.

• 2x

• 2

• 4

• none (not proportional)

Is this equation y = 14x showing proportionality?

• yes

• no

What is the equation y=px for the table?

• y=1/3x

• y=3x

• y=5x

• y=1/5x

The constant of proportionality in the equation y = ½x is _______. 

• x

• y

• 1/2

• 2

A proportional relationship can be written as an equation in the form
____ = _____  _____

• y = p+x

• y = p-x

• y = px

• y = p/x

What does p represent in the equation y = px?

• independent variable

• constant of proportionality

• dependent variable

• proportional

Which graph is non-proportional?

• A

• B

• C

• D

Identify the constant of proportionality.

• 25

• 50

• 100

• 1/50

• none (not proportional)

Identify the constant of proportionality.

• 2

• 4

• 1/2

• 1/4

• none (not proportional)