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 Maria swims 12 laps (L) in 6 minutes (m) for 50 laps, what is the constant of proportionality, k, in laps per minute when L=km?

• k=1

• k=2

• k=5

• k=2.5