Ilovemeowmeow 3 years ago What is the y coordinate of the y−intercept of the line that passes through the points (−2, −2) and (2, 4)?

1. 3psilon

Use the slope formula $\frac{ y_{2}-y_{1} }{ x_{2}-x_{1} }$

2. Ilovemeowmeow

Oh do this again? Okay got it hahah

3. 3psilon

$\frac{ 4-(-2) }{2-(-2) }$

4. 3psilon

Yes . Get it ? :)

5. Ilovemeowmeow

I do! thanks!

6. 3psilon

But wait that's the slope. You need the y intercept which is the b in y = mx +b

7. Ilovemeowmeow

oh.

8. 3psilon

So we found the slope m . Now just plug in One of the two coordinates and the slope into y = mx + b and solve for b. Let me know if you need more help

9. Ilovemeowmeow

I need more help forsure

10. 3psilon

Ok did you find the slope m?

11. Ilovemeowmeow

finding it now.

12. 3psilon

Ok let me know what you get

13. Ilovemeowmeow

I got 3/2?

14. 3psilon

Good job! Now we use the slope intercept formula y = mx + b

15. 3psilon

pick either (−2, −2) or (2, 4) to plug in for x and y

16. 3psilon

And you'll be able to solve for the y - intercept b

17. Ilovemeowmeow

so -2=3/2(-2)+b? lo

18. 3psilon

19. Ilovemeowmeow

how though?!

20. Ilovemeowmeow

I just cant find an answer...

21. 3psilon

Just isolate the term b

22. 3psilon

b is the y intercept

23. Ilovemeowmeow

Is -1=3/2(-2) it?

24. 3psilon

nope I'll draw it out for you. one sec

25. Ilovemeowmeow

ok

26. 3psilon

|dw:1350673516403:dw|

27. Ilovemeowmeow

28. 3psilon

Yes , b = 1 . Do you get it?

29. Ilovemeowmeow

Now that you wrote it out, i get it. thank you!