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Warm ups. Find the x and y intercepts: 3x -9y = 18 Write in Point-Slope Form: (5,-3) m = -2 (3,4) (-1,8) Write in Standard Form: (2,3) (0,3) (4, -5) m = -3. Reminders. Join Edmodo Quiz Tomorrow I will stamp homework tomorrow . 6-4 Slope-Intercept Form.
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Warm ups • Find the x and y intercepts: 3x -9y = 18 • Write in Point-Slope Form: (5,-3) m = -2 (3,4) (-1,8) • Write in Standard Form: (2,3) (0,3) (4, -5) m = -3
Reminders • Join Edmodo • Quiz Tomorrow • I will stamp homework tomorrow
6-4 Slope-Intercept Form Objective: To write an equation in slope-intercept form.
Slope-Intercept Form Does anyone know what it is?... y = mx + b m = slope b = y-intercept (this is on y axis)
Given slope and y-intercept Example 1: Write an equation in slope-intercept form Given: m = 4 b = -2 y = 4x – 2 Example 2: Write an equation in slope-intercept form Given:
Write in Slope-Intercept 5x – 4y = 20
Example 5 Write an equation in slope-intercept form given: (2,1) (4,0) Steps: • Find slope • Plug into point-slope • Convert to slope-intercept x1 y1 x2 y2
Example 6 Write an equation in slope-intercept form given: (0,6) (4,0) x1 y1 x2 y2
Given a graph Example 7: write an equation in slope-intercept form b = 2 m = -2/3 -2 3
Given a graph TOO: write an equation in slope-intercept form b = -4 m = 1 y = x – 4 1 1
TOO – students can present. • m = 5, b = -3 • y – 2 = 4(x + 7) • (-2,-3) (-1,2) Answers: • y = 5x – 3 • y = 4x + 30 • y = 5x + 7
Homework time • Pg. 351 # 28-39 • Work quietly in your seat • Also, finish all unfinished homework. • I will stamp tomorrow • Quiz tomorrow!!!!!!