1. 4.5 Point-Slope form of a linear equation
If a line passes through (2, -4) and has a slope of 5, write the point-slope form of the equation of the line.

2. Try this one
If a line passes through (-2,0) and has a slope of -3/2, write the point-slope form of the equation of the line.

3. Horizontal & Vertical Lines
Horizontal Lines
Slope = 0
The equation of the line is y = #
Point-slope form: y - # = 0
Vertical Lines
Slope = undefined
The equation of the line is x = #
There is no point-slope form

5. Standard Form of a Linear Equation
Ax + By = C
A, B, and C are integers (numbers).
A is not a fraction, decimal, or negative.
A or B can be zero but not both.

6. Standard Form: Ax + By = C
Given: y + 4 = 5(x – 2)
Write it in Standard Form
Distribute
Subtract 4 from both sides
Subtract 5x
Change all signs so A is not negative.

7. Write it in slope-intercept form
Given:
Distribute
Subtract 3

8. Try These ~ Page 223 #1, 5, 8 1. y – 3 = -2(x -1) 5. 3x + 4y = -9