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# Algebra review

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### Algebra review

1. 1. Slope Formula
2. 3. Distance Formula
3. 5. Midpoint Formula
4. 7. Vertical Lines
5. 8. • Think vertebra to help with visual •Undefined Slope! (cannot walk up walls) •Form x=#
6. 9. Horizontal Lines
7. 10. • Think horizon to help with visual •Slope = Zero (walking across left to right there is no incline or decline) •Form y=#
8. 11. Slope-Intercept Form
9. 13. Standard Form
10. 14. • x and y on the same side •A is positive •No fractions
11. 15. Point-Slope Form
12. 16. • helps to find b and write the equation of a line all at once
13. 17. Parallel Lines
14. 18. • Do not intersect •Have the same slopes •Symbol: ||
15. 19. Perpendicular Lines
16. 20. • Intersect at a right angle/90 ⁰ •Have slopes that are opposite, reciprocals of each other (flip it and switch it) •Symbol: