1. 4.2 Part 2 Horizontal and Vertical Lines
Algebra
4.2 Part 2
Horizontal and Vertical Lines

2. Equation of a Horizontal Line
y = b .
y = b
where the line crosses the Y axis
For example: if the lines crosses at the point (0,5) then the equation of the horizontal line is y = 5

3. Equation of a Vertical Line
x = a
x = a .
where the line crosses the x axis
For example: if the lines crosses at the point (-3,0) then the equation of the vertical line is x = -3

4. Graphing Guidelines Follow the graphing guidelines:
Graph paper
Ruler
No more then 2 lines per coordinate plane
Label y-intercept
Show plotted points clearly
Axis lines have 2 arrows
Graphed lines have 2 arrows and are long
Label the line with the equation

5. HOMEWORK
pg # 36 – 55 It says to graph using a table, you may want to use slope-intercept form to go quicker.