Constant of Proportionality

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

• y = k+x
• y = k-x
• y = kx
• y = k/x

The point (0, 0) is called the origin.

• True
• False

y=kx.  What does the k represent?

• constant of proportionality
• Kittens

• Kindness

• all of these are correct

What is the constant of proportionality, k, that relates y to x?

• 6
• 3
• 2
• 1/2

What is the constant of proportionality, k, that relates y to x?

• 4
• 12
• 3
• 1/3

The constant of proportionality, k, where y relates to x in the equation y = ½x is k=___. 

• x
• y
• 1/2
• 2

What is the constant of proportionality, k, that relates y to x?

• 1/3
• 3
• 5
• 10

What is the constant of proportionality, k, that relates y to x?

• $3
• $4
• $2
• $9

Identify the constant of proportionality, k, that relates y to x

• k = 1/0.45

• k = 0.45

• k = -0.45

• k = -1/0.45

• none (not proportional)

If Joshua types 84 words (w) in 4 minutes (m), of 300 words, what is the constant of proportionality, k, in words per minutes, if w=km?

• k=1200

• k=336

• k=75

• k=21