Identify a line having zero slope. Application
a. x = y
b. x = 100
c. y = 100
d. x = 0

The correct answer is: ∴ Option C i.e. y = 100 is the correct answer.

Step-by-step solution:-
We know that when a line, plotted on a graph is represented by a Horizontal line, its slope is 0.
i.e. slopes of lines that are parallel to x-axis are 0.
Equations of lines that are parallel to x-axis are in the form y = b where b is the value of y-intercept.
Option C i.e. y = 100 is the only option that satisfies this condition.
Hence, y = 100 is the line having zero slope.