## rebecca1233 3 years ago Part a.) Find the slope of the line that contains the points, (1, 2) and (2, 5). Part b.) Using the slope that you found in part a and one of the given points, write the equation of the line. Please write your final answer in slope-intercept form.

1. AriPotta

do you know the slope formula?

2. rebecca1233

sorta.. i forgot

3. AriPotta

4. AriPotta

what would the equation look like after you substitute the x's and y's?

5. rebecca1233

2-5 / 2-1

6. AriPotta

(2-5)/(1-2) when you decide which coordinate pair will be "1" and "2" you gotta keep it like that

7. AriPotta

so what's our slope?

8. rebecca1233

idk ? im confused now

9. AriPotta

what's 2 - 5?

10. rebecca1233

-3

11. AriPotta

and what's 1 - 2?

12. rebecca1233

-1

13. AriPotta

right, so what's -3/-1?

14. rebecca1233

3

15. AriPotta

exactly, so our slope is 3

16. AriPotta

do you understand how we got that?

17. rebecca1233

sorta can u just explain it in simplier terms

18. AriPotta

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19. AriPotta

|dw:1351215523686:dw|

20. rebecca1233

okay so part a : is slope is 3 and part b is ?

21. AriPotta

do you know what point-slope form is?

22. AriPotta

because you have to put the information into point-slope form first before you can get it into slope-intercept form

23. rebecca1233

YES. im just confused on now part b

24. rebecca1233

y = 3x and what for slope form

25. AriPotta

what? point-slope form is y - y1 = m(x - x1)

26. rebecca1233

(2-5)/(1-2)

27. AriPotta

you haven't done part b yet

28. AriPotta

if we use the first ordered pair for our equation, we know that y1 is 2, x1 is 1, and m is 3. so y - 2 = 3(x - 1)

29. AriPotta

do you know how to change that into slope-intercept form?

30. rebecca1233

no

31. rebecca1233

y = 3x-1?

32. AriPotta

that's right :D

33. rebecca1233

thanks . i have a few more questions i need help with i would like help with them