Identifying Constant of Variation in Proportional Tables

What does the rate of change in a proportional relationship indicate?

• The difference between each X value

• The sum of Y values

• How one quantity changes in relation to another

• The maximum value of Y

How is the constant of proportionality (K) calculated?

• K = Y - X

• K = X + Y

• K = X / Y

• K = Y / X

What is the equation form to represent proportional relationships?

• Y = X + K

• Y = X - K

• Y = K / X

• Y = KX

If the first ordered pair is (2, 14), what is the constant of proportionality?

• 7

• 12

• 28

• 6

What is the correct equation for the relationship where the constant of proportionality is 4.5?

• Y = 4.5 + X

• Y = 4.5X

• Y = X / 4.5

• Y = X - 4.5

If Jason mows 4 yards, how much will he earn?

• $60

• $80

• $40

• $100

Will Jason reach his goal of saving $130 after mowing 6 yards?

• No, he will have only $100

• Yes, with $10 extra

• Yes, exactly $130

• No, he will be $10 short

What is the rate of change for the pattern of stars?

• 3 stars per figure

• 2 stars per figure

• 5 stars per figure

• 4 stars per figure

For the aquarium field trip, how much does it cost for 14 tickets?

• $120

• $112

• $104

• $96

Which table correctly represents the cost for 12 aquarium tickets?

• Table D

• Table B

• Table A

• Table C