Question

Write the equation of a line with the given information in point-slope form, through points (1,2) and (3,8).

Answer 1

find the slope first.

8-2
---
3-1

6/2

3

Answer 2

So here you have the same type problem as the last one, except that they didn't give you the slope. Big meenies! Fortunately you can find it using the slope formula.

Answer 3

As stated above, the slope works out to be 3. So now plug that slope, along with either one of your two points into the point-slope formula for the line to get the equation.

Answer 4

Slope is different than point-slope, correct?

Answer 5

Yes. The slope formula uses two points to compute the slope between them:

\[Slope = \frac{y_2 - y_1}{x_2-x_1}\]

Answer 6

Saifoo, she's asked to put it into point-slope, no further work needed.

Answer 7

Yes, slope is one part of the equation.

as in y = mx + c

so "m" is the slope.

Answer 8

i think i did the same! :P

Answer 9

Once you get the slope of the line (using the slope formula above) you just plug it into point-slope formula.

Answer 10

You solved for slope-intercept form.

Answer 11

Okay, i got the slope. what is slope-intercept?

Answer 12

BOTH ARE THE SAME THINGS MAN! >.<

Answer 13

It's the :

y = mx + b

form of the equation.

Answer 14

Stop shouting. If the question asks for point-slope, solving for slope-intercept is:
a) more work
b) likely to get her marked wrong

Answer 15

You need to find the point-slope equation for the line, so plug it into the formula:

y-y1 = m(x-x1)

Answer 16

OK, tell me the difference..

And i did from the same method!

Answer 17

What set of ( ) do i put into the point-slope equation?

Answer 18

Either point will work

Answer 19

You can pick any point on that line and it'll work.

Answer 20

TELL ME THE DIFFERENCE.

Answer 21

??

Answer 22

So it would be y-1=3(x-2)?

Answer 23

You have your x1 and y1 mixed up there.

Answer 24

Oh...

Answer 25

(x1,y1) = (1,2)

Answer 26

@polpak, Answer me too!

Answer 27

Saifoo, stop spamming.

Answer 28

IM NOT SPAMMING!

i did the same thing!
why u deleted my answer again?

i even showed the working.

Answer 29

How do you delete someone elses answers?! Woaah...I didnt know you could do that.

Answer 30

Did you get your answer victoria?

Answer 31

Please answer mee tooo!

Answer 32

Yes, i did. Thankyou. (: Now only 8 more problems to go and im done woth all my summer homework! :D

Answer 33

I am not going to argue with you Saifoo. I have neither the time nor the inclination.

Answer 34

Good luck rather.

Answer 35

but wht was wrong with my answer answer?

Answer 36

lol, cancel one answer.

Answer 37

this is rude Polpak!

Answer 38

I think your answer was fine. I didnt really understand it, but i dont seee what the problem is, you just did it a different way, and added one more step, by putting it into slope-intercept form. (:

Answer 39

He always does the same thing, deletes my answers and then answer himself.
LOL.