## sonja_lee2 3 years ago Find the slope of the line passing through the given points. Then tell whether the line falls, rises, is horizontal, or is vertical. (14,-3),(4,11)

1. Hero

Are you familiar with y = mx + b?

2. sonja_lee2

yes

3. sonja_lee2

i know how to find the slope i just dont know how to find out whether if it falls, rises that stuff

4. Hero

Okay, good, now, I'm going to simply plug each point into that formula: -3 = 14m + b 11 = 4m + b Are you with me so far?

5. sonja_lee2

yes

6. Hero

Okay, m is the slope, so I'm going to isolate b in both equations: b = -3 - 14m b = 11 - 4m Do you see how I got that?

7. sonja_lee2

kinda

8. Hero

It takes a little practice to understand it, but now I'm going to set b = b to get: -3 - 14m = 11 - 4m

9. Hero

Now all I have to do is solve for m: -3 - 11 = 14m - 4m -14 = 10m -14/10 = m - 7/5 = m

10. Hero

There we go

11. sonja_lee2

ok i was wait thats not right

12. Hero

You entered the answer as soon as I posted it, lol

13. sonja_lee2

kk i got that too

14. sonja_lee2

haha yeah

15. Hero

You shouldn't enter the answer so fast :P I guess I can take my own advice in that regard.

16. sonja_lee2

okay

17. Hero

Sometimes, I make typos, so you should wait at least one minute after someone posts their answer.

18. sonja_lee2

um ok

19. Hero

My fingers are not as bright as my brain

20. Hero

Sometimes, my fingers hit keys they shouldn't.

21. sonja_lee2

oh okay its a

22. sonja_lee2

all G

23. Hero

By the way, If the slope is NEGATIVE, it FALLS If the slope is POSITIVE, it RISES

24. sonja_lee2

always?

25. Hero

If something falls, it's always going down, right? If a plane rises from the ground, it is always going up, right?

26. sonja_lee2

right

27. Hero

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28. sonja_lee2

ohh i see

29. Hero

Yeah just think about a plane either taking a nose dive or lift off

30. sonja_lee2

ohh okay thank u!

31. Hero

|dw:1348450045305:dw|
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