1. Chapter 6 Section 2
Graphing Linear Equations and Inequalities in Two Variables Using Alterative Methods

2. Essential Question
What is the best way to graph a linear equation and inequality in two variables?

3. Intercepts X-intercept: let y = 0 and solve for x (x, 0)
Y-intercept: let x = 0 and solve for y OR look for the constant (0, y)
Example: 3x – y = 5
Example: x + 2y = 8
Example: 3x + 4y = -12

4. Slope Usually uses “m” as variable Vertical change/horizontal change
Rise/run
(y2 - y1)/(x2 – x1)

5. Examples: Find the slope

6. Practice Graphing Using Intercepts
2x + 3y = 6
3x – y = 5
x + 7y = 0

7. Slope Intercept Form Y = mx +b M = slope B = y-intercept Practice:
Y = -2x + 4
5x – y = -2
2x + y = 4