Undefined slope v/s zero slopeIn mathematics, everywhere, there is an implementation of line. It is implemented everywhere, i.e., in geometry, algebra, and others. The slope defines the line's direction. In this article, we are going to discuss two types of slopes that are undefined slope and zero slope. Before understanding the types of slope, let's first see the brief description of slope. What is slope?The slope defines the steepness of the line. The word 'steepness' means how much the line is slanted. In other words, the slope shows the direction of a line on the coordinate plane. Thus, it is also known as the gradient of a line. Ramp, stairs, etc., are some of the reallife examples of the slope. In mathematics, the slope is the ratio of "rise" by "run" between two points. "Rise" means the vertical change in the line, and "Run" means the horizontal change in the line. The slope of a line between two points (x_{1}, y_{1}) and (x_{2}, y_{2}) can be determined by finding the difference between the coordinates of the points. The slope of a line is generally represented by the letter 'm'.
m = Δx/Δy = (y_{2}  y_{1})/(x_{2}  x_{1})
or, m = rise/run Undefined slopeThe undefined slope is the slope of the vertical line. That means if the line is vertical, the slope is undefined. The line in the undefined slope is parallel to the yaxis, and the value of ?x is 0. The xcoordinate of undefined slope never changes no matter what the ycoordinate is. In an undefined slope, the value of Δy is a nonzero integer, whereas the value of Δx is 0. The undefined slope is opposite of the zero slope. In terms of rise and run, the rise in undefined slope is either positive or negative, and run in the undefined slope is zero.
m = Δy/Δx = positive or negative Δy/0
The undefined value of m represents the undefined slope and the vertical line. In the following graph, you can see the representation of an undefined slope. The line in the below graph is parallel to the yaxis that denotes the undefined slope. Fig: Representation of undefined slope In the above image, there is a vertical line which is indicating the undefined slope. Zero slopeIn the zero slope, the line is parallel to the xaxis, and ycoordinate never changes. It is the slope of the horizontal line. In terms of rise and run, the rise in the zero slope is 0, and the run in the zero slope is positive.
m = Δy/Δx = 0/positive Δx
If the value of m is equal to zero, the line is horizontal and has a constant slope. In the following graph, you can see the representation of zero slope. The line in the below graph is parallel to the xaxis that denotes the zero slope, and y in the zero slope remains the same, no matter what the x is. Fig: Representation of zero slope In the above image, there is a horizontal line which is indicating the zero slope. Now, let's see the difference between an undefined slope and a zero slope. Difference between Undefined slope and Zero slopeThe undefined slope is opposite of the Zero slope. The difference between the undefined slope and zero slope is tabulated as follows 
That's all about the article. We have tried to give you sufficient information in an easier way. Hope it is beneficial to you and provide you the information about undefined slope, zero slope, and their comparison.
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