## anonymous 3 years ago find the equation of the line in slope intercept form, that passes through (4,-1) and (6,-2) can someone help me please :)

1. myininaya

Do you know what slope intercept form is?

2. anonymous

yes, when i did it i got $y= -\frac{ 1 }{ 2 }x+\frac{ 7 }{ 2 }$

3. myininaya

The slope is right...Checking the y-intercept now...

4. anonymous

ok

5. myininaya

You should retry to find the y-intercept. It is incorrect. Start here: y=mx+b where m=-1/2 y=-1/2 * x +b Use one of the points gven to plug in for x and to plug in for y.

6. myininaya

Either use (4,-1) or (6,-2) but don't mix and match

7. anonymous

i got 1

8. myininaya

yes b=1

9. anonymous

so if i were to show my work on a homework assignment i would find the slope and then put it in point slope form? or just plug it back into the equation in slope intercept

10. myininaya

Either way.

11. anonymous

because when i did it in point slope form like my teacher said i did not get one i got 7/2

12. myininaya

Then you did it incorrectly. You found the slope m=-1/2 Plug it in y-y1=m(x-x1) Don't forget to distribute y-y1=mx-mx1

13. myininaya

add y1 on both sides y=mx-mx1+y1

14. anonymous

yeah i got it now. and one more question standard form is ax+by=c right?

15. myininaya

Yes.

16. anonymous

okay because my book said ax+by+c=0 and my teacher said ax+by=c

17. myininaya

Go with what your teacher said. Either one is fine. Both of those forms don't differ a whole a lot. All my math life, I have prefered the slope-intercept form.

18. myininaya

Your teacher will be grading you and it is their preference in what form they want the answer.

19. anonymous

okay thank you so much :)