Math 9

Unit 4 Linear Relations

Lesson 945 Using Graphs to Estimate Values

Focus

The FOCUS section introduces the main concept that will be covered in the lesson.

TEXT Page 191

Read/Work through the  Focus  section at the top of page 191 in  your textbook.

This is covered in detail in the Investigation and the rest of the lesson, so I didn’t make a video for this section

Investigate

Investigate an idea or problem, with a partner if possible.
The investigation provides the background for the ideas presented in the lesson.

TEXT Page 191

Read/Work through the  Investigate  section on Page 191 in your textbook.

You can do this activity on your own.
Do your best to answer the questions, then watch the Video Tutorial for help or to check your answers.

Watch

Video Tutorial

Connect

Connect summarizes the math in the lesson.
A presentation of ideas connected to the lesson focus.

TEXT Pages 192 - 193

Read/Work through the  Connect  section on Pages 192 - 193  in your textbook.

Examples

Examples will give you TOOLS for solving problems, and also show you that there may be different ways to approach a question.

Example 1  Using Interpolation to Solve Problems

TEXT Pages 193 - 194

Work through Example 1 on Pages 193 - 194  in your textbook.

Watch

Video Tutorial

Example 2  Using Extrapolation to Solve Problems

TEXT Pages 194 - 195

Work through Example 2 on Pages 194 - 195  in your textbook.

Watch

Video Tutorial

Example 3  Interpolating and Extrapolating to Determine Values of Variables from a Graph

TEXT Page 195

Work through Example 3 on Page 195 in your textbook.

Watch

Video Tutorial

Practice Problems

Doing Practice Problems

Practice problems reinforce the math presented in this lesson.

•	Work through the practice problems for this lesson.
	These problems are for practice, you don’t need to hand them in!
	(your teacher may assign specific questions for you to complete)

•	Use the answers in the back of the book to CHECK YOUR WORK!

•	If you make a mistake, TRY TO FIX IT!

•	If you need help or want more information, view the video solutions provided.

•	If you still need more help,  CONTACT YOUR TEACHER!

Types of Practice Problems

Discuss the Ideas invites you to talk about the math.
If possible share your thoughts/ideas/answers with another person.
If you can help them understand, then you likely have good understanding yourself.

Check questions require basic understanding of the ideas of the  lesson.

Apply questions will require you to dig deeper for a solution.

Take It Further questions offer enrichment and extension.

Notes

Question 2,    I didn’t do a video for this one.
I answered this when I did Question 1

Question 3,    I didn’t do a video for this one.
I answered this when I did Question 1.
A good example here is the runner example.   
As they get tired,  their average speed will most likely decrease, so extrapolating too far would not be very accurate.

Video Solution Links

Check your work for every problem you do!
If you make a mistake,  try to fix it!
Use the video solutions for more information.
If a problem still doesn’t make sense, ASK YOUR TEACHER FOR HELP!

({{"Question 1",  ,  , "Question 4", "Question 5"}, {"Question 6", "Question 7", "Question 8", "Question 9", "Question 10"}, {"Question 11", "Question 12", "Question 13", "Question 14", "Question 15"}})