1. ## Linear Law

I have plotted a Linear graph, using P1 and P2. I now need to determin by calculation the "Law of the line".
P1 (-2, -6.2) and P2 ( 3, 4.8)

Can anyone help?

2. ## Re: Linear Law

Originally Posted by peugeotgtidanny
I have plotted a Linear graph, using P1 and P2. I now need to determin by calculation the "Law of the line".
P1 (-2, -6.2) and P2 ( 3, 4.8) Can anyone help?
Can you tell what the heck Law of the line could possibly be?

3. ## Re: Linear Law

I think its:
Gradient = y divided by x

4. ## Re: Linear Law

Originally Posted by peugeotgtidanny
I think its:
Gradient = y divided by x

Given the points $(x_1,y_1)~\&~(x_2,y_2)$ the line determined is

$(y-y_1)=\left(\frac{y_2-y_1}{x_2-x_1}\right)(x-x_1)$ if $x_2-x_1\ne 0$

5. ## Re: Linear Law

That is normally referred to as the "slope" of the line.