how dy/dx and y1-y2=m(x2-x1) related?

I mean shouldn't dy/dx = m ?

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- Dec 15th 2012, 09:20 PMameerulislamhow dy/dx and y2-y1=m(x2-x1) related?
how dy/dx and y1-y2=m(x2-x1) related?

I mean shouldn't dy/dx = m ? - Dec 15th 2012, 09:32 PMMarkFLRe: how dy/dx and y2-y1=m(x2-x1) related?
The tangent line to a differentiable function at the point $\displaystyle (x_1,y_1)$ is:

$\displaystyle y-y_1=f'(x_1)(x-x_1)$ - Dec 15th 2012, 09:35 PMProve ItRe: how dy/dx and y2-y1=m(x2-x1) related?
- Dec 15th 2012, 10:06 PMameerulislamRe: how dy/dx and y2-y1=m(x2-x1) related?