1. #1
Lines

2. Quick Review

3. Quick Review

4. Quick Review

5. Quick Review Solutions

6. Quick Review Solutions

7. Quick Review Solutions

8. What you’ll learn about…
Increments
Slope of a Line
Parallel and Perpendicular Lines
Equations of Lines
Applications
…and why.
Linear equations are used extensively in business and economic applications.

9. Increments

10. Example Increments

11. Slope of a Line
A line that goes uphill as x increases has a positive slope. A line that goes downhill as x increases has a negative slope.

12. Slope of a Line

13. Parallel and Perpendicular Lines

14. Equations of Lines

15. Example Equations of Lines

16. Point Slope Equation

17. Example: Point Slope Equation

18. Equations of Lines

19. Slope-Intercept Equation

20. General Linear Equation
Although the general linear form helps in the quick identification of lines, the slope-intercept form is the one to enter into a calculator for graphing.

21. Example Analyzing and Graphing a General Linear Equation
[-10, 10] by [-10, 10]

22. Example Determining a Function
f(x) -1 1 5 3 11

23. Example Reimbursed Expenses