point is also known as dot.
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The Geometrical meaning of the second derivative is the curvature of the function. If the function has zero second derivative it is straight or flat.
The first derivative is the rate of change, and the second derivative is the rate of change of the rate of change.
A point is a geometric element that has position but no extension. It is an exact fixed location having no length, width, or depth.
The partial derivative of z=f(x,y) have a simple geometrical representation. Suppose the graph of z = f (x y) is the surface shown. Consider the partial derivative of f with respect to x at a point. Holding y constant and varying x, we trace out a curve that is the intersection of the surface with the vertical plane. The partial derivative measures the change in z per unit increase in x along this curve. Thus, it is just the slope of the curve at a value of x. The geometrical interpretation of is analogous in both types of derivatives, i.e., Ordinary and Partial Derivatives
A point.