1. Today we will graph linear equations in slope intercept form.

2. There are 4 variables in this form of a linear equation.
y represents the outcome or output after you substitute for x.
x represents the input
m represents the slope of the line
b represents the y-intercept (where the line crosses the y-axis).

3. We can graph the linear equation quickly if it is in slope intercept form.
1st plot the value of b on the y-axis
2nd use the slope to find other points on the line
3rd draw a line through the points

4. Example 1
1st step plot b on the y axis

5. Example 1 1st step plot b on the y axis
2nd step use the slope to find other points that are on the line.

6. Example 1 1st step plot b on the y axis
2nd step use the slope to find other points that are on the line.
3rd step draw a line through the points

7. Example 2
1st plot b on the y axis

8. Example 2 1st step plot b on the y axis
2nd step use the slope to find other points that are on the line.

9. Example 2 1st step plot b on the y axis
2nd step use the slope to find other points that are on the line.
3rd step draw a line through the points

10. You Try It!

11. What if the equation is not in slope intercept form?
Solve the equation for y
Example:
4x-3y=18
-3y=-4x+18
y = (4/3)x-6
Now you can graph it because it is in y = mx + b form.

12. Try another one! Graph x = 7y -21 Solve the equation for y x = 7y -21