1. LESSON 20 PREREQ B: Writing the Equation of a Line

2. The SLOPE Formula:

3. Ex 1: Find the slope. a) b) c)

4. HORIZONTAL LINES: SLOPE = M = 0 Y-INTERCEPT (0, B) VERTICAL LINES: SLOPE = M IS UNDEFINED NO Y-INTERCEPT

5. Slope-Intercept form:

6. Point-Slope form:

7. Standard form:

8. Ex 2: Write the equation of the line in slope-intercept form & sketch the graph. a) Slope = 2, y-int = 4 b) Slope = y-int = − 1

9. Ex 3: Write the equation of the line that passes through the given point and has the given slope. a) Slope = 2 b) Slope =

10. Ex 4: Write the equation of the line that passes through the given points. a) & b) &

11. HW – WORKSHEET