1. 3-4 Equations of Lines Forms of Equations
Slope-Intercept Form: y = mx + b
Point-Slope Form: y – y1 = m(x – x1)
m means slope
b means y intercept

2. Special types of lines
If the slope is 0 the equation is written as y = b (i.e. y = 6)
If the slope is undefined the equation is written as x = x-intercept (i.e. x = 2)

3. Slope Intercept Form
Ex 1: Write the equation of a line in slope intercept form given: m = 3 and b = 2
Ex 2: Write the equation of a line in slope intercept form given: m =2 and passes through (-2, -5)
Ex 3: Write the equation of a line in slope intercept form given points: A (0,3) and B (-2, -1)

4. Parallel and Perpendicular Lines
Ex 4: Write the equation of the line passing through (-7, -4) parallel to y = ½ x + 9
Ex 5: Write the equation of the line passing through (-2, 2) perpendicular to y = 5x - 8

5. Classwork/Homework
P even