Page 16 - Writing Equations from Two Points/Table

Writing Equations from Two Points/Table

EQ: How can you write a linear equation when given a table or two points?

Poll

Did you finish the notes video for Page 16?

• Yes, and copied my notes while I watched.

• Mostly finished (or finished, but didn't write down notes).

• Started watching, but only watched a little bit.

• I didn't watch it.

Use your notes to help you answer the following questions!

Seriously, the answers will be right in your notes!

Multiple Choice

What goes on the TOP of the Slope Formula?

• y2-x2

• y2-y1

• y1-y2

• x2-x1

Multiple Choice

What goes on the BOTTOM of the Slope Formula?

• x1-x2

• x2-y1

• y2-y1

• x2-x1

Second y-value minus first y-value

------------------------------------------------------- = Slope (m)

Second x-value minus first x-value​

​

Slope Formula:

Get out a piece of scratch paper.

You're going to find the slope!

Fill in the Blanks

Find the slope of a line that goes through (1, 5) and (2, 7)

Fill in the Blanks

Find the slope of a line that passes through (2, 6) and (5, 18)

(Don't forget to simplify!)

​You have to replace x, y, and m with their numbers. And then you have to SOLVE the problem.

1. multiply m and x

2. add or subtract the answer from part 1 to/from both sides (inverse operations) to solve for b. ​

​

Finding the y-intercept (b)

Fill in the Blanks

Find the y-intercept (b) for a line that passes through (1, 5) and (2, 7)

Remember, your slope was m = 2 for this problem.

Fill in the Blanks

Find the y-intercept (b) for a line that passes through (2, 6) and (5, 18)

Remember, the slope for this problem was m = 4

Now that you've found m and b, you just need to replace those variables with their numbers in the equation y = mx + b

​

Writing your equation:

Fill in the Blanks

Write an equation for a line that passes through (1, 5) and (2, 7)

Remember, m = 2 and b = 3

You MUST use the form y = mx + b

Fill in the Blanks

Write the equation for a line that passes through (2, 6) and (5, 18)

Remember, m = 4 and b = -2

Poll

How well do you feel you understand how to do this?

• 4 - I get it. I'm ready to do tomorrow's Desmos.

• 3 - I mostly get it. I need to review the notes video before tomorrow's Desmos.

• 2 - I only kind of get it. I need to review the notes video and ask you for help before tomorrow's Desmos.

• 1 - I don't get it. I need to rewatch the notes video, and extra examples. Then ask questions before the Desmos.

Open Ended

Do you have any questions about how to do this right now? (If not, please think about what is the most confusing for you, and have questions ready to go at the start of class tomorrow).

Homework: finish the notes video (page 16)

You only have homework if you didn't finish the page 16 notes video/taking notes.

OR

If you were confused by today's Quizizz lesson, please review the notes video, along with the "Extra Help Video" for Page 16 at the bottom of the video page on the website. ​

Be honest. If you didn't finish, you need to for homework. If you're confused, you need to watch the extra help video.