Proportional Relationships McDaniel

What ratio is equivalent to 4:5? Select all that apply.

• 8:10

• 20:25

• 5:6

• 1:5/4

What does k represent in the equation y = kx?

• constant rate of change

• constant of proportionality

• the equation

• x/y

How do I find the constant?

• k = x/y

• k = 2x

• k = y/x

• k = 2y

Does the graph show a proportional relationship? 

• No, it's a curved line

• No, it's a pretty line

• Yes, if you connect the line, it is kind of straight.

• Yes, the dots are pink

What is the constant of proportionality from meters to kilometers?

• 1,000

• 1

• 1/1,000

• 1/2

What is the constant of proportionality?

• 45

• 50

• 27

• 1

Concrete building blocks weigh 28 pounds each. If b represents the number of concrete blocks and w represents the weight, what equation relates the two variables?

• 28/w=b

• 28w=b

• 28b=w

• 28bw

A store sells rope by the meter. The equation p=0.8L represents the price p (in dollars) of a piece of nylon rope that is L meters long. How much does the nylon rope cost?

• $8

• $80

• $0.80

• $0.08

Are these two drinks going to taste the same? Select all that apply.

• yes, the constant of proportionality is 1.5

• no, they don't have the same constant of proportionality.

• yes, they're equivalent ratios.

• no, they the first one will taste stronger.

Jane wants to triple her lemonade recipe. For two drinks, she mixes 3 lemons with 2 cups of water. What will she need to triple her recipe?

• 6 lemons, 4 cups of water

• 8 lemons, 6 cups of water

• 9 lemons, 6 cups of water

• 12 lemons, 8 cups of water