how do you find the gradient of a pragh?

Answer 1

The answer given by Sobot is correct for a straight line graph. For nonlinear graph, rise over run would give you average gradient. For getting gradient at a point one will have to draw a tangent to the graph and then calculate the gradient of the tangent by sobot's formula. Remember that you have to take the actual values of the two variables and not what you plot on the graph; because the values you plot depend on the scale chosen. If you take the distance on the graph paper as such or take tangent of theta in the graph the answer would epend upon the scales chosen for the two variables, whereas the gradient is independent of the scale chosen.

Answer 2

Like any gradient of a scalar function:

grad(pragh) = partial of (pragh) with respect to x times i vector + partial of (pragh) with respect to y times j vector + partial of (pragh) with respect to z times k vector

This is pertinent to the rectangular coordinate system.
(Even more interesting is: What is a pragh??)

Answer 3

slope

simply rise over run

Answer 4

rise over run