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Welcome Back!. Tuesday. What is the slope of the line -5x – 2y = 22?. Pick up your new packet and find your seat. Silently start your warm-up for Tuesday. IW. Learning Target:. IWBAT write the equation of a perpendicular line in various situations.

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Pick up your new packet and find your seat. Silently start your warm-up for Tuesday.


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pick up your new packet and find your seat silently start your warm up for tuesday

Welcome Back!

Tuesday

What is the slope of the line

-5x – 2y = 22?

Pick up your new packet and find your seat.

Silently start your warm-up for Tuesday.

IW

Learning

Target:

IWBAT write the equation of a perpendicular line in various situations.

silently work on your warm up
Silently work on your Warm Up

You have 5 minutes

Learning

Target:

Learning

Target:

IWBAT write the equation of a perpendicular line in various situations.

don t forget to write your learning target
Don’t forget to write your Learning Target

You have 4 minutes

Learning

Target:

IWBAT demonstrate several ways it is importantto solve for y

Learning

Target:

IWBAT write the equation of a perpendicular line in various situations.

make sure you answer all of the questions
Make Sure You Answer All of the Questions

You have 3 minutes

Learning

Target:

IWBAT demonstrate several ways it is importantto solve for y

Learning

Target:

IWBAT write the equation of a perpendicular line in various situations.

done answer the reflection question
Done? Answer the Reflection Question!

You have 2 minutes

Learning

Target:

IWBAT demonstrate several ways it is importantto solve for y

Learning

Target:

IWBAT write the equation of a perpendicular line in various situations.

time s almost up make sure you have your name on both sides of your aem
Time’s Almost Up!Make sure you have your name on BOTH sides of your AEM

You have 1 minute

Learning

Target:

IWBAT demonstrate several ways it is importantto solve for y

Learning

Target:

IWBAT write the equation of a perpendicular line in various situations.

warm up review time
Warm-Up Review Time!!!

Eyes up Front

Mouths Closed

Ears Listening

warm up check
Warm Up Check

2. Solve for y

3x + y = 12

What is the slope of the line

-5x – 2y = 22?

IWBAT demonstrate several ways it is importantto solve for y

Learning

Target:

IWBAT write the equation of a perpendicular line in various situations.

slide10

Slopes of Perpendicular Lines

Find the slope of each line:

Slope (m) of line A: _________

Slope (m) of line B: _________

Slope (m) of line C: _________

A

B

3/2

3/2

C

-2/3

What do you notice about the slopes of A and B?

________________________________________________________________

The slopes are the same

Slopes of ____________ lines are ___________________!

parallel

the same

slide11

What do you notice about the slopes of B and C?

__________________________________________________________________

The slopes different; opposite; reverse, upside down; flipped

perpendicular

Slopes of __________________ lines are _____________________ _____________________!!

opposite

reciprocals

What’s an opposite reciprocal?

EXAMPLES:

3

-1/3

sign

OPPOSITE – change the ___________

RECIPROCAL - ___________!

7/5

-5/7

flip it

_____ AND _____

_____ AND _____

slide12

EX 1

  • Use the following clues to write an equation for Line A.
      • Line A has a y-intercept of -1.
      • Line A is perpendicular to the line
      • y = 4x + 3
  • Equation for Line A: _____________________

y = -1/4x - 1

slide13

EX 2

  • Line K is perpendicular to the line y = -5x + 4.
  • Line K contains the point (3,3).

1/5

Slope (m) : ________________

Y-intercept (b) : ____________

Equation of line:

_______________________

2.4

y = 1/5x + 2.4

slide14

EX 3

Write the equation of the line that goes through (4, -5) and is perpendicular to the line y = 4x + 4.

What is the slope of your new line?

-1/4

1

Find the y-intercept (Plug into y = mx + b)

2

Now put it all together….

The equation of the line is: _______________________

y = -1/4x - 4

slide15

You try it!

Write the equation of the line that goes through (0, 4) and is perpendicular to the line y = 3x.

The equation of the line is: _______________________

y = -1/3 + 4

slide16
For the Rest of Class work on the problems on Page 5 and 6. If you get done early, start your homework – Page 9