1. Answers

2. Write the Formulas Slope Formula y₂-y₁ x₂-x₁ Point Slope Form y-y₁=m(x-x₁) Slope-intercept Form y=mx+b

3. Find Slope 3. (4,7), (3,6) 6-7 3-4 = 1 4. (4,0), (1,5) 5-0 1-4 = 5 -3

4. Write an equation in slope intercept form 5. m=2 (2,1) y-1=2(x-2) y-1=2x-4 +1+1 y=2x-3 6. (2,6), (1,3) 3-6 1-2 m=-3m = 3 y-6=3(x-2) y-6=3x-6 +6 +6 y=3x+0 y=3x

5. Write an equation in slope intercept form 7. m=0 (-6,3) y-3=0(x+6) y-3=0x-0 +3 +3 y=0x+3 y=3 8. (5,5), (-9,7) 7-5 -9-5 2= -1 -14 7 y-5=-1/7(x-5) y-5=-1/7x+5/7 +5 +5 y=-1/7x+40/7

6. Parallel, Perpendicular, Neither 9. y = 3x+4 y = 3x+7 Slopes are the same – Parallel 10. y = 3/5x-3 5y = 3x-10 Put bottom equation into slope intercept form! 5y = 3x-10 5 5 5 y=3/5x-2 Slopes are the same - parallel

7. Parallel, Perpendicular, Neither 11. y = 3x+2 -6x+2y = -8 Rearrange 2y=6x-8 2 2 2 y=3x-8 Slopes are the same - parallel 12. y = 3-x 2y-x = 8 Rearrange 2y=x+8 2 2 2 y=1/2x+4 Slopes are different - neither

8. Graph Each Equation 13. 16x+8y=24 rearrange 8y=-16x+24 8 8 8 y=-2x+3 14. x+y=5 rearrange y=-x+5 15. 4x+12y=12 12y=-4x+12 12 12 12 y=-1/3x+1

9. 13. y=-2x+3 14. y=-x+5 15. y=-1/3x+1

10. Graph Each Equation 16. x=-317. x-2y=6 -2y=-x + 6 -2 -2 -2 y=1/2x-3

11. 16. x=-3 17. y=1/2x-3

12. Graph Each Equation 19. 3y=1/3x+6 3y=1/3x+6 3 3 3 y=1/9x+2 20. y=-5

13. 19. y=1/9x+2 20. y=-5