1. erdog82

y – y1 = m(x – x1) this is the formula, if that's all you need

2. erdog82

http://www.purplemath.com/modules/strtlneq2.htm this may help too ☺

3. MaeganR

I know the formula, but I need help figuring out how to solve the problem.

4. erdog82

well, what is the problem?

5. MaeganR

(2,1) m=3 Can you do it step by step?

6. JUICEDECAFE

Hi, Heres a example: You are given the point (4,3) and a slope of 2. Find the equation for this line in point slope form. Solution: Just plug the given values into your point-slope formula above. Your point (4,3) is in the form of (x1,y1). That means where you see y1, use 3. Where you see x1, use 4. Your slope was given to you, so where you see m, use 2. Pretty simple, huh? Your final result should look like: y-3=2(x-4) More Practice: Your point is (-1,5). The slope is 1/2. Create the equation that describes this line in point-slope form. Try working it out on your own. The answer is: y-5=.5(x+1) . If that's not what you got, re-read the lesson and try again.

7. erdog82

Well, just replace y1 with 1 x1 with 2 and m with 3

8. MaeganR

so if its asking for an equation you dont have to solve it?

9. JUICEDECAFE

Depands

10. erdog82

I dont think so, unless it says solve for ____

11. MaeganR

It says "Write an equation of the line in point-slope form through the given point and with the given slope m."

12. erdog82

So, I think that's all you need to do! Please press best response next to my answer if you think I helped! ☺

13. MaeganR

so do they just want the formula with the numbers plugged in or do they want it solved also?

14. erdog82

Well, it doesn't say to solve it, does it?

15. MaeganR

Nope

16. erdog82

so I think that's it!

17. MaeganR

ok. thank you(: can you check back on my page every once in a while and help me? it would mean a lot. (:

18. erdog82

ok ☺