Unit 2 Lesson 8 OpenUp practice 8.2 and 8.4

Unit 2 Lesson 8 Comparing Relationships with Equations

• ​Let’s develop methods for deciding if a relationship is proportional.

• Use a table to determine whether a given equation represents a proportional relationship, and justify (in writing) the decision.

​NC.7.RP.2
Recognize and represent proportional relationships between quantities.

Standard and objectives

​Complete 8.2
More Conversions

​Complete 8.4
All kinds of equations

​~ Complete the rest of the tables on your own.
(Use your calculator)

! Important !
This should be in your notes

Poll

How well did you understand the lesson?

1 = lowest

5 = highest

• 1

• 2

• 3

• 4

• 5

Multiple Choice

Which statement best describes the relationship between x and y in the table?

• Proportional
• Not Proportional

Multiple Choice

Is this table proportional?

• Yes
• No

Multiple Choice

Does the table represent a proportional relationship?

• Yes.
• No.

Multiple Choice

Write an equation for this relationship.

Remember: y=kx

• y=1/5x

• y=1/2x

• y=2x

• y=5x

Multiple Choice

What does k represent in the equation y = kx?

• constant rate of change
• constant of proportionality
• the equation
• x/y

Multiple Choice

Write the equation for the table given.

• y = 1/3x
• y = 3x
• y = 1/2x
• y = 2x

Multiple Choice

Does this equation represent a proportional relationship?

• Yes

• No

Multiple Choice

Does this equation represent a proportional relationship?

• Yes

• No

Multiple Choice

What is the constant of proportionality of the equation below?
$$y=9.3x$$  

• 9.3

• 3

• 9

• 9.3x

Multiple Choice

Which equation shows a NON-proportional relationship of x and y?

• y = 5x
• y = 2.5x
• y = x + 3
• y = 1/2x

Multiple Select

Determine which of the following equations represent a proportional relationship. Select all that apply.

• $$y=3x-8$$

• $$y=\frac{1}{4}x$$

• $$y=5x$$

• $$y=0.7x+8.8$$

• $$y=0.5x$$

Multiple Choice

Does the equation show a proportional relationship?

• Yes
• No

Poll

Do you like watching the videos better than doing it as a class?

• Yes

• No

Open Ended

What is the best way that you learn?