In the simplest way, we can say that the gradient represents the rate of change (or the amount of change). Yes! This is the simplest definition of the gradient. It may be a positive change (positive gradient) or it may be a negative change (negative gradient). Let's understand the gradient in brief with the help of the following example:

Suppose we are traveling in a car on a mountain, I will not tell you upward or downward; at point *a*, we attain a height of *1000* meters and at point *b*, we reach *1500* meters. However, we have just covered a distance of *200* meters. Can you tell me what the rate of change (speed) of our car is and whether we are moving upward or downward? Well, the second part of the question is very ...