Question

Write the equation of the line that passes through each pair of points in slope-intercept form.
(-1,7),(4,-3)
P L E A S E H E L P .

Answer 1

Tell me this first: How do you find your slope?

Answer 2

Slope:
(y2-y1)/(x2-x1)

Answer 3

(y2-y1)/(x2-x1) find your m,or slope

Answer 4

This Is How You Find Your Slope.
y=mx+b

Answer 5

No Umme, your slope is the m-value.

m=(y2-y1)/(x2-x1)

Answer 6

No that's the equation of the line, not slope.

Answer 7

\[\huge Slope=\frac{y _{2}-y _{1}}{x _{2}-x _{1}}\]

Answer 8

Umme, tell me what you got for your slope and I'll tell you more about the problem.

Answer 9

IGot y=-2x-11 For My Answer.

Answer 10

m = (-3-7)/(4-(-1))

m= -10/5
m=-2/1
m=-2

Answer 11

Okay This Is What IDid.

Answer 12

y2-y1=15-5
x2-x1=-8-2 = 10/10=1
y=mx+b
5=-1(2)+b
5=-2+b

Answer 13

5=-2+b
+-2 +-2
3=b
y=-1x-3

Answer 14

Read through what I typed very carefully.

Answer 15

For a second I thought you hit and run lol

Answer 16

How Did You Get 4 Though.?

Answer 17

&Lol.:P No.

Answer 18

Oh man am I not here tonight!

Answer 19

SORRY! Tiny little error, I will repost.

Answer 20

It's Okay. :P &Thanks.

Answer 21

Okay, now you have 2 things:

Your point: You can use either (-1,7) or (4,-3), doesn't matter which one you choose.
Your slope: m=-2

Now you need to find your b-value.

y=mx+b

I'll use (-1,7) for (x,y) and m=-2

7=-2(-1) +b

b = 5

Now this is the easy part. All you need for slope-intercept form is your slope and your b-value.

y=mx+b

y=-2x +5

Answer 22

&How'd You Get 5.?:\ I'm Confused.

Answer 23

Doesn't Negative 2 And Negative One Equal To Positive 3.?

Answer 24

7 = -2(-1) +b

7 = 2 + b

7-2 = b

5 = b

Answer 25

Oh.Okay.Nevermind.My Mistake. :P

Answer 26

2*1 = 2

2*(-1) = -2

(-2)(-1) = 2

:-)

Answer 27

No problemo

Answer 28

Thanks A Ton. :D

Answer 29

&:D

Answer 30

So, in summary:

You are given 2 points. To find your line, follow these steps:

1: Find the slope
2. Find your b-value with y=mx+b (plug in a point, either point will work) and your m-value. Solve for b.

3. You'll have your m-value and your b-value. Put ONLY THOSE values into

y=mx+b

And there you have it, your line!

Answer 31

Thanks Again. :)

Answer 32

No problem :-)

I would suggest Paul's online notes for any of your algebra needs. And calculus when you take it in college.

Answer 33

What's Paul's Online Notes.? ._.

Answer 34

http://tutorial.math.lamar.edu/Classes/Alg/Lines.aspx

Paul = math God ...imho :-)

Answer 35

Oh. Okay. Thanks.

Answer 36

&Another Thing, For This Same Thing, IHave Another Problem. It's (2,5),(-8,15)

Answer 37

The Answer IGot Is y= -1x-3.

Answer 38

Is It Right.?

Answer 39

lemme try... one sec

Answer 40

Okay.

Answer 41

I should really do these on paper :-(

Answer 42

True. But Oh Well. :P

Answer 43

Is My Answer Right Though.?

Answer 44

So I got m= -1 and b=7

Answer 45

5 = (-1)(2) +b

5 = -2 +b

7 =b

Answer 46

If you put in both of your points, this will give you a step-by-step walk through on how to do these:

http://www.webmath.com/equline1.html

Answer 47

Okay. Thanks.

Answer 48

Whoahh.! This Website's Really Good.!

Answer 49

There is another formula for doing it all in one step. Question is, if you can remember the formula.

http://www.youtube.com/watch?v=GFM8NOe_XM4

Answer 50

Thank You.

Answer 51

IDon't Know How They Got 7 Though.

Answer 52

5 = (-1)(2) +b

5 = -2 +b

7 =b

Answer 53

y=mx+b

y=5
m=-1
x=2

Answer 54

Oh.Okay.Thanks Again.

Answer 55

Welcome :-). Keep working at it. Do as many of these problems as possible. That's how these things work... you bang your head against the wall until something finally sticks :-D

Answer 56

Good luck!

Answer 57

So 5+2 = 7 Or What.? o.O

Answer 58

Yep