Lesson 23 - LT 3.8 & 3.9

What is the constant of proportionality for the following graph?

• 80
• 20
• 40
• 160

What is the equation for the graph?

• y=½x
• y=2x
• x=2y
• x=½y

Which statement matches the graph?

• Taylor can write 6 words per minute

• Taylor can write 25 words per minute

• Taylor can write 50 words per minute

• Taylor can write 150 words per minute

What is the ordered pair that represents the unit rate?

• (1, 15)

• (15, 1)

• (4, 60)

The graph shows the distance a train travels over time. How fast is the train traveling?

• 25 miles per hour

• 90 miles per hour

• 50 miles per hour

• 45 miles per hour

Select ALL equations that are proportional.

• y = 3x

• y = 25x

• y = 7x

• y = 2x - 1

• y = 4000x

Identify the constant of proportionality.

• k = 2x

• k = 2

• k = 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

Write an equation that represents the relationship between the weight(x) and the cost(y).

• y = 1/2 x

• y = 1/4 x

• y = 2x

• y = 4x

Write an equation for this situation.

• y=9.75x
• y=19x
• y=19.25x
• y=9.5x