## Liv1234 one year ago Is anyone good with slopes and lines for algebra?

1. Mehek14

yes

2. Liv1234

3. Liv1234

4. Mehek14

do you know the formula?

5. Liv1234

I learned it in ninth grade and I really don't remember it, but if you show me it, I'm sure I can remember some of it.

6. Mehek14

$$\bf{\dfrac{y_2-y_1}{x_2-x_1}}$$

7. anonymous

sorry (i know this is annoying) don't have any help to give but love your profile pic and wish you good luck

8. Liv1234

I remember the formula, I'm just trying to remember how to put the numbers in. And thanks! (:

9. Liv1234

6-2/11-12?

10. anonymous

:)

11. Mehek14

|dw:1443210781657:dw|

12. Liv1234

11-12/6-2?

13. Liv1234

Would the answer be A? -1/4? And could you help me with a similar one just to make sure I did it right?

14. Mehek14

correct and sure

15. Liv1234

Thanks!

16. Mehek14

what did you get?

17. Liv1234

I'm putting the numbers into the formula right now to see.

18. Liv1234

-1-1/-3-6?

19. Liv1234

I think the answer is undefined.

20. Mehek14

-1 - (-1)/ -3 - 6

21. Liv1234

0/-9

22. Mehek14

-1 - (-1) = 0 -3 - 6 = -9

23. Liv1234

24. Mehek14

yup undefined = when the denominator = 0

25. Liv1234

Thanks! Could you help me with another one?

26. Mehek14

yup

27. Liv1234

28. Liv1234

Is the formula for slope intercept form "A + B = C"

29. Mehek14

$$\bf{y=mx+b}$$ m = slope b = y-intercept

30. Liv1234

I'm having trouble deciding what the line goes through :/

31. Mehek14

ok so look at the y-intercept at what point does it cross the y-axis?

32. Liv1234

At 2?

33. Mehek14

so b = 2 $$\bf{y=mx+2}$$

34. Mehek14

so either C or D

35. Mehek14

both have the slope 2

36. Mehek14

but 1 is -2 one is 2

37. Liv1234

I think it's C because it's in the negative

38. Mehek14

line is going up

39. Liv1234

So, D? Because since the line is going up, it has to be in the positives?

40. Mehek14

so postive

41. Mehek14

yes D

42. Liv1234

Can you help me with another one? I appreciate your help.

43. Mehek14

ok

44. Liv1234

45. Liv1234

46. Mehek14

change to y =mx + b $$\bf{y=5x-3}$$

47. Mehek14

y-intercept -3 so A or B

48. Mehek14

positive slope so B

49. Mehek14

I mean A

50. Liv1234

So the answer is A? And can you help me with one more, I promise it's the last one.