## anonymous 5 years ago Help with the following: Find an equation of the line passing through each pair of point. Write equation in the form Ax=By=C

1. bahrom7893

what are the points?

2. anonymous

oh sorry, there (-1,3) and (-2,-5)

3. bahrom7893

And I assume u meant Ax + By = C

4. anonymous

yes, sorry

5. bahrom7893

so first we find the slope: M = (-5-3)/(-2+1) = -8/-1 = 8

6. anonymous

Wait can you still stay on mines lemme jus re do it and check to see if i get it rite..plz

7. bahrom7893

okay

8. anonymous

Where did you get -2+1, is'nt it suppose to be -2-1?

9. bahrom7893

-2 - (-1) = -2 + 1

10. anonymous

oh okay, wait..;plzz i really need help

11. bahrom7893

i will.. just yell at me in chat if im not here

12. anonymous

okay

13. anonymous

okay i got the slope which i 8.. Then how to i put it in the ax+bx=c form

14. bahrom7893

okay now i would do this: y-y1 = M(x-x1) y-3 = 8(x+1)

15. bahrom7893

then simplify:

16. anonymous

SO its y-3=8x+8

17. anonymous

How do i simplify

18. bahrom7893

y -3 = 8x + 8 -8x + y = 8+3 -2x + y = 11

19. bahrom7893

So this is in form: Ax + By = C, where A = -2; B = 1 and C = 11

20. anonymous

How did you simplify??? And i keep getting -11=8x-y

21. bahrom7893

y -3 = 8x + 8 subtract 8x and add 3 from and to both sides: y - 8x - 3 + 3 = 8x - 8x + 3 + 8

22. bahrom7893

woops sorry that 2 was supposed to be an 8

23. bahrom7893

y - 8x = 11

24. anonymous

in the back of my book it gives me 8x-y=-11

25. bahrom7893

its the same thing, just multiply thru by negative 1... both of us are right

26. anonymous

so either way 8x-y=-11 and y-8x=11 are correct?