1. Equation for a Vertical Line and a Horizontal Line

2. Equation for a Horizontal Line
What is the equation for the line below?
Make a Table: X Y -8 7
Notice how all of the y-values are the same: 7. 7 2 7 7 7
The equation of a horizontal line is always of the form: y = a number

3. Equation for a Vertical Line
Graph the following equation:
Make a Table:
Notice the equation says the x-value is always the same: -4.
Plot the points X Y -4 -9 -4 -3
Now choose random numbers for the y-values. -4 3 -4 6
Connect the points
The equation of a vertical line is always of the form: x = a number