1. Warm Up In your notes show your work
Write the slope intercept form of the equation
Slope -2 y-int passes through (-2,4) slope 3
Solve each equation
3. 4a – 5 = /9V – 6 = 14
Evaluate
5. (25 – 4) ÷ ( 22 – 13) a b. 7 c. 20/7 d. 5

2. Parallel and Perpendicular
Obj: I can write the equations of lines parallel and perpendicular to given lines

3. vocabulary
Parallel Lines: have the same slope and do Not intersect Perpendicular lines: intersect at right angles and their slopes are Opposite inverses (reciprocals)

4. Writing Parallel Equations
Write the equation of The line that passes through the point and is Parallel to the line:
Ex: (3,2) y = 3X + 5
use Slope Intercept Form
Y = MX + B Parallel means = slope
2 = 3(3) + B
2 = 9 + B
y = 3X -7

5. Writing perpendicular equations
Write the equation of the line perpendicular to the equation and passing through the given slope. Ex: (-3,-2) x + 4y = 12 y = -1/4x + 3 rewrite the equation in slope-int form -2 = 4 (-3) + b use slope int form to plug in given values Note that the new slope is 4 (opp. Reciprical) -2 = b 10 = b solve for b y = 4x + 10 plug in new slope and y-int

6. Problems Write the Parallel and perpendicular Equations
(6, 4) y = 1/3X + 1
(4,2) Y = -2X + 3
(4, -6) X + 2y = 5

7. The line with equation y = 3x - 4 contains side ac of a right triangle abc. If the vertex of the right angle A is (3,5), what is an equation of the line that contains side Ab?
B ? A 3x - 4 C

8. Classwork
Pg 296 # 14 – 38 even !! Complete in class. finish for homework. Due Friday at the beginning of class.