Constant of Proportionality - on-level

When we compare quantities, we compare them as _____ over ______. 

• x over y
• y over x
• rate over one
• peanut butter over jelly

Cheddar Cheese cost $4.25 per pound. Which equation best represents y, the total cost of x pounds of cheddar cheese?

• x = 4.25y

• y = 4.25x

• y = 4.25 - x

• y = 4.25 + x

Write an equation for this situation.

• k=19.25x
• y=19x
• y=19.25x
• y=9.5x

Identify the constant of proportionality.

• k = 2x

• k = 2

• k = 4

• none (not proportional)

Identify the constant of proportionality.

• k = 1/0.45

• k = 0.45

• k = -0.45

• k = -1/0.45

• none (not proportional)

What is the Constant of Proportionality?

• 46
• 92
• 0.2
• not proportional

A proportional relationship can be written as an equation in the form:

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

Is the given table a proportional relationship? If so, what is the constant?

• Yes; 1/3
• Yes; 3
• Yes; 5
• No

If Justin can type 408 words in 4 minutes, how many words can he type per minute?

• 102 words per minute
• 100 words per minute
• 400 words per minute
• 412 words per minute

Identify the constant of proportionality.

• k = 5

• k = 1/5

• k = 1

• k = 2.5

• none (not proportional)