Illustrative Math Constant of Proportionality

Which of the tables above represents a proportional relationship?

• a & c

• a, b & c

• a, c & d

• all of them

Write the equation for the table given.

• y = 16x

• y=8x

• y=12x

Is this table proportional or non-proportional?

• Yes

• No

Write an equation for this relationship.

• y = 18x

• y = 18.50x

• y = 22.50x

• y = 22x

What is the direct variation?

• y=9/3x

• y=6x

• y=9x

• y=3x

Identify the constant of proportionality.

• k = 2

• k = 4

• k = 1/2

• k = 1/4

• none (not proportional)

Which of the following statements is TRUE about the graph? Choose all that apply.

• The point (2, 8) shows that 8 pounds of cheese cost$2.00.

• The point (1.5, 6) shows the cost is $6.00 for 1.5pounds of cheese.

• The point (0.75, 3) shows that 0.75 pound of cheesecosts $3.00.

• The point (0.25, 1) shows the cost is $0.25 for 1pound of cheese.

• The point (0, 0) shows the cost is $0.00 for 0 pounds of cheese

Which best describes the graph represented in this table?

•  proportional

• non-proportional

Which graph is proportional?

• A

• B

• C and D

• All of the graphs are proportional

What is the constant of proportionality for this table?

• 1/9

• 9

• 8