Warm Up Find the value of m. 1.2. 3.4. 2.9B Writing the Equation of the Line

Warm UpFind the value of m.

1. 2.

3. 4.

2.9B Writing the Equation of the Line

Math Journal 9-261. Find the slope and the y-intercept of each line to write the equation of the line in slope-intercept form.

Given the line equation, find the slope of the parallel line and the perpendicular line.2. // m = m =

3. // m = m =

2.9B Writing the Equation of the Line

ObjectivesGraph lines and write their equations in slope-intercept and point-slope form.

For each equation, identify the slope and y-intercept and then graph the line.

Example 1:

Example 2:

Example 3:

Example 4: Example 5:

Identify the slope and a point for each line. Then graph the line.

Example 6:

Example 7:

Write the equation of the line that passes through the given point and has the given slope.Example 8: Example 9:

(3, 5), m = 2 (-4, 7), m = ½

Write the equation of the line that passes through the two given points.Example 10: Example 11:(-2, -6), (4, 2) (-5, 3), (-3, 6)

Write the equation of the line that passes through the given point and is…

(a)Parallel to the given line and (b) perpendicular to the given line.

Example 12

y = 3x – 5

Parallel line Perpendicular line

m = m =

Example 13

y = 1/2 x + 4

Parallel line Perpendicular line

m = m =