1. Slope Formula

3. Distance Formula

5. Midpoint Formula

7. Vertical Lines

8. • Think vertebra to help with visual •Undefined Slope! (cannot walk up walls) •Form x=#

9. Horizontal Lines

10. • Think horizon to help with visual •Slope = Zero (walking across left to right there is no incline or decline) •Form y=#

11. Slope-Intercept Form

13. Standard Form

14. • x and y on the same side •A is positive •No fractions

15. Point-Slope Form

16. • helps to find b and write the equation of a line all at once

17. Parallel Lines

18. • Do not intersect •Have the same slopes •Symbol: ||

19. Perpendicular Lines

20. • Intersect at a right angle/90 ⁰ •Have slopes that are opposite, reciprocals of each other (flip it and switch it) •Symbol:

21. Quadratic Formula

23. X-intercepts

24. • Also known as roots and zeros •Where the graph crosses the x-axis •Plug 0 in for y and solve for x •Answer: (#,0) as an ordered pair

25. y-intercepts

26. • Where the graph crosses the y-axis •Plug 0 in for x and solve for y •Answer: (0,#) as an ordered pair