Directly Proportional Relationships

The cost of apples varies directly with the number of pounds purchased. Using the table, find the unit price.

• $3.36/pound

• $1.68/pound

Write an equation to represent the proportional relationship shown in the table.

• y=12x

• y=4x

• y=¼x

• y=¹²/₃x

Which statements are true about the data in the tables?

• A is not proportional but B is

• both pass through (0,0)

• y = 3x is the equation for table A

• y = 4x is the equation for table B

• if graphed, these tables would make the same line

The graph shows the cost to rent a canoe from company A. At company B, the cost to rent a canoe is $ 5 dollars per hour. How much more expensive would it be to rent from company A if you rented for 5 hours?

• $1

• $3

• $5

• $7

The constant of proportionality can be found by finding the __________  _____________.

• unit rate

• ratio rate

• proportion answer

• rational number

Is the data in the table proportional or non-proportional?

• Proportional

• Non-Proportional

What is the unit rate/constant of proportionality?

• 80 hours per mile

• 40 hours per mile

• 40 miles per hour

• 0.025 miles per hour

Select all graphs that represent proportional relationships.

• 
• 

How do you find the constant of proportionality?

• k = x/y

• k = y/x

• k = y + x

• k = 2x

Which of the tables has a constant of proportionality of $0.20 per apple?

• A & B

• A

• B

• All of them