## anonymous one year ago What is the slope of the line passing through the points (–1, 3) and (4, –7)? a. 2 b. 3/4 c. - 4/3 d. -2

1. jim_thompson5910

slope formula $\Large m = \frac{y_{2}-y_{1}}{x_{2}-x_{1}}$

2. anonymous

(-1, 3) and (4, 7) x1, y1 x2, y2 M= y2 - y1 ----------- x2 - x1 = 7-(3) - ------- 4 - (1) = 4/5

3. anonymous

i am confused here

4. anonymous

at this part i mean

5. jim_thompson5910

In english: Step 1) subtract the y coordinates Step 2) subtract the x coordinates (same order as you did y) step 3) divide the y difference (from step 1) over the x difference (in step 2)

6. jim_thompson5910

you should have 4 - (-1) in the bottom

7. anonymous

yeah i do i forgot the negative here one sec

8. anonymous

and 4 - (-1) = 5

9. jim_thompson5910

ok where are you stuck?

10. anonymous

which is 4/5

11. anonymous

the fact that i can not simplifiy the 4/5 any lower and it is not n answer choice

12. jim_thompson5910

13. jim_thompson5910

oh wait

14. anonymous

the ones up top

15. jim_thompson5910

you did 7-3 in the top when it should be -7-3

16. anonymous

OMG

17. jim_thompson5910

when you wrote (-1, 3) and (4, 7) you wrote the second point incorrectly so that may be why

18. anonymous

let me re work

19. anonymous

-7 - (3) ---------- 4 - (-1) = -10 ------ 5

20. jim_thompson5910

looks much better

21. anonymous

which is -2

22. jim_thompson5910

correct

23. anonymous

haha thank you for chatching that here is a medal

24. jim_thompson5910

you're welcome