Is there a website where if you give them 2 line points they will find slope and y intercept using y=mx+b?

Question

exactly what terri k said

Answer 1

dude everyoneelse is gay i'd give you the website if i knew one, i'm all for taking the easy way out why waste you time on something when you can just find the answers online!

Answer 2

No, there isn't a website, but you can find the slope of a line passing through those two points and then use one of the points in the point slope form (y - k) = m(x - h), where (h, k) is the coordinate of a point on the line and m is the slope. Just simplify this to a slope-intercept form.

Very handy for those types of problems!

Answer 3

There is a simple formula that you can use for this, just plug into your calculator, or work it out on paper.

Here's how you derive said formula.

If both the points (X1,Y1) and (X2,Y2) lie on the same line, then they must both satisfy

y = mx + b;

in other words,

Y1 = m X1 + b, and also Y2 = m X2 +b.

Clear so far?.....This means that the unknown quantities here are not x and y, but rather m and b. If you haven't covered systems of equations yet, bear with me. The best way to solve this system is to use the "substitution method." We rearrange so that

b = Y2 - m X2.

Then, the expression for b can be substituted into the first equation:

Y1 = m X1 + b
= m X1 + (Y2 - mX2).

Solving for m:

Y1 - Y2 = m(X1 - X2) (because of the "distributive" property)

m = (Y1 - Y2) / (X1 - X2).

This gives the classic "rise over run" formula for slope. Now, we have an exact formula for m with no unknown values, we can substitute back into our original expression for b:

b = Y2 - m X2.
= Y2 - X2 (Y1 - Y2) / (X1 - X2).

So, to recap, you have

m = (Y1 - Y2) / (X1 - X2).
b = Y2 - m X2
= Y2 - X2 (Y1 - Y2) / (X1 - X2).

Hope that makes sense,
~W.O.M.B.A.T.

Answer 4

Dude, just replace the variable with 2,1,0, -1,-2. It's simply and not that hard. If this is your homework and it's a odd (1,3,5,7,9) number, look in the back of the book but only if the problem was out of the book.

Answer 5

There are programs available that can graph these, but this is fairly easy math. Review the text and you'll do fine.

Answer 6

dude the slope is the M and the y intercept is B

Answer 7

Yeah, I think I used it once, you could probably look the formula up at google.com and they may have something. It's basic math though, your teacher should be reviewing it with you, 8th grade right? or 9th grade. Gosh I hated algebra, and geometry >.< gah, now off to my geometry homework...

Answer 8

your graphin calculator can do that

enter x1 and x2 into list l1
enter y1 and y2 inlto list l2

go to stat cal then lin regression y=ax+b

Answer 9

IM DOING THE SAME EXACT THING RIGHT NOW! (8th grade)
dude. that sh**s hard. im seeing a tutor.

Answer 10

m= slope

b= y intercept

http://id.mind.net/~zona/mmts/functionInstitute/linearFunctions/lsif.html