Top Banner
GRAPHING EQUATIONS OF LINES How to graph equations in y = mx + b
14

GRAPHING EQUATIONS OF LINES How to graph equations in y = mx + b.

Dec 23, 2015

Download

Documents

Welcome message from author
This document is posted to help you gain knowledge. Please leave a comment to let me know what you think about it! Share it to your friends and learn new things together.
Transcript
Page 1: GRAPHING EQUATIONS OF LINES How to graph equations in y = mx + b.

GRAPHING EQUATIONS OF LINESHow to graph equations in y = mx + b

Page 2: GRAPHING EQUATIONS OF LINES How to graph equations in y = mx + b.

WARM UP

1. Write the equation of the line:

2. Write the equation of a line with a slope of – 2 and passing through thepoint (0, -3)

3. Write the equation of a line

passing through the points

(- 2, 4) and (3, - 1)

4. Write the equation of the line

with a slope of 6 and y-intercept

of – 4?

Page 3: GRAPHING EQUATIONS OF LINES How to graph equations in y = mx + b.

How did we find the equation of a line?

What is the equation of this line?

Page 4: GRAPHING EQUATIONS OF LINES How to graph equations in y = mx + b.

Today you will learn how to graph a line in the form of y = mx + b.

What do you think this means?

How do you think we are going to do this?

Look at the graph for some ideas.

What does your partner think you should do?

Page 5: GRAPHING EQUATIONS OF LINES How to graph equations in y = mx + b.

Step one: What is the y-intercept? How would you write this as an ordered pair?

Step two: What is the slope of the line?

Step three: From the y-intercept, move up and over and then down and over in the opposite direction. Plot these points.

Step four: Draw a line through the three points. You must have at least three points.

https://www.youtube.com/watch?v=vIw23jBE-f4

Page 6: GRAPHING EQUATIONS OF LINES How to graph equations in y = mx + b.

Graph the line y = 2x – 1

1. Identify the y-intercept. (0, -1)

2. Identify the slope. (m = 2)

3. From the y-intercept, rise and run. (rise up two, run over one.) Plot the point.

4. Go back to the y-intercept, rise and run in the opposite direction. Plot the point.

5. Join the dots to form a line.

Page 7: GRAPHING EQUATIONS OF LINES How to graph equations in y = mx + b.

Graph the line y = -3x + 4

1. Identify the y-intercept. (0, 4)

2. Identify the slope. (m = -3)

3. From the y-intercept, rise and run. (rise up two, run over one.) Plot the point.

4. Go back to the y-intercept, rise and run in the opposite direction. Plot the point.

5. Join the dots to form a line.

Page 8: GRAPHING EQUATIONS OF LINES How to graph equations in y = mx + b.

Graph the line y = x – 4

1. Identify the y-intercept. (0, - 4)

2. Identify the slope. (m = )

3. From the y-intercept, rise and run. (rise up two, run over one.) Plot the point.

4. Go back to the y-intercept, rise and run in the opposite direction. Plot the point.

5. Join the dots to form a line.

Page 9: GRAPHING EQUATIONS OF LINES How to graph equations in y = mx + b.

Try this one with your partner:

y = 5x - 3

Page 10: GRAPHING EQUATIONS OF LINES How to graph equations in y = mx + b.

Are you ready to try one on your own?Try this one:

y = - x + 2

Page 11: GRAPHING EQUATIONS OF LINES How to graph equations in y = mx + b.

Special lines:

How would you graph the liney = 2?

What do we know about this line?

Page 12: GRAPHING EQUATIONS OF LINES How to graph equations in y = mx + b.

How do we graph the line x = - 6?

What do we know about this line?

Page 13: GRAPHING EQUATIONS OF LINES How to graph equations in y = mx + b.

Work to complete the worksheet on graphing lines.

Look back at your notes for help.

Work with a partner if you need to.

Page 14: GRAPHING EQUATIONS OF LINES How to graph equations in y = mx + b.

Complete the graphing worksheet. If you need additional help, watch the video using the link below.

http://www.showme.com/sh/?h=v7m62S0