1. Writing Equations from graphs and graphing equations

2. y = x - 5 y-intercept slope
1st find y-intercept – where the line crosses the Y axis
2nd find Slope – angle of the line

3. y = x - 5 1st - y-intercept – where the line crosses the Y axis

4. y = x - 5 Slope is the angle of the line. You can think slope
Rise – how far you “rise” – go up/down
Run – how far you “run” across the grid

6. y = x - 5
Rise = 2
Run = 3

7. Hehe 

8. y = 2x + 6

9. Can go in either order – over first, then up/down or up/down the over
y = 2x + 6 slope = remember 2 =
If you can’t go over (right) and up – do the opposite = over left and down

10. One more!!!

11. y = -3x + 2

12. y = -3x + 2
-3 = which means instead of right then up, it’s right then DOWN

13. Given a graph – make an equation 1. Find y-intercept 2. Find slope =

14. Given a graph – make an equation 1. Find y-intercept
b = 2

15. Given a graph – make an equation 2. Find slope =
Run = 2
Rise = -1
Negative because it’s down =

16. Put it together y = mx + b
m =
b = 2
y = x + 2

18. Y-intercept = -4 = m y = mx + b y = 3x -4
Find the equation for the graph:
Y-intercept = -4
Rise = 3
Run = 1
= m
y = mx + b
y = 3x -4