warmups 1. graph y = -3 2. graph y = 2x - 4 3. write an equation in standard form: (2,-2) (1,4) 4....
TRANSCRIPT
Warmups
1. Graph y = -3
2. Graph y = 2x - 4
3. Write an equation in standard form: (2,-2) (1,4)
4. Parallel, Perpendicular or neither?
3 4( 1)y x 17
4y x
Perpendicular Lines
Objective: To write an equation of a line perpendicular to another
Perpendicular Lines
How will yesterday change if we want the lines to be perpendicular?? The slope will be opposite sign & reciprocal!!!!
Write an equation in slope-intercept form that passes through the given point and is perpendicular to the given line.
Example 1: (0,4)5
72
y x
Example 2
Write an equation in SLOPE-INTERCEPT form that passes through the given point and is perpendicular to the given line.
y = 2x - 5 (6,4)
Example 3
Write an equation in SLOPE-INTERCEPT form that passes through the given point and is perpendicular to the given line.
2x – 3y = 9 (0,2)
TOO
1. 5x + 4y = 8 (10,5)
2. y = 1/4x – 4 (-2,3)
3. 14x + 2y = 4 (6,4)
43
5y x
4 5y x
1 22
7 7y x
14
4y x
Homework
Pg. 367 # 33-45
Review Chapter 6 part 2
Speaker and Scribe:1 board
1 marker
1 sock
Find the Slope
(3,4)(9, 1) 5
6
(4,1)(9, 2) 3
5
Determine Value of r.
5(4, )( , 2)
3r r m
7r
3(3, )( ,5)
5r r m
8r
Write in STANDARD
( 1, 2)(1,8) 5 3x y
1( 4,6)
2m
2 8x y
Write in POINT-SLOPE
(5,4) 3m 4 3( 5)y x
15 ( 2)3
y x 1(2, 5)
3m
Find x and y intercepts
2 3 12x y (6,0)(0,4)
( 2,0)(0, 8) 4 8y x
Find slope and y-intercept
5 15x y 5, 15m b
2, 5m b 7 2( 1)y x
Parallel, perp. Or neither?
2 3 4x y 10 15 20x y
3 2 6x y 3 2 5x y
2 9y x 1
32
y x
parallel neither Perpendicular