Constant Function
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Definition of Constant Function
Constant Function is a linear function of the form y = b, where b is a constant.
It is also written as f(x) = b.
The graph of a Constant Function is a horizontal line.
Video Examples: Constant functions
Example of Constant Function
 y = 10, y =  3, y = 11 are some examples of constant functions.
 The graph shows a constant function y = 12.
 The value of the y is 12 for any x.
Solved Example on Constant Function
Ques: Which one of the following equations represents a constant function?
Choices:
A. x = 3B. 2x + y = 4
C. y = 6
D. 2y + x = 12
Correct Answer: C
Solution:

Step 1: A constant function is of the form y = b, where b is a constant.
Step 2: So, here, only y = 6 represents a constant function.
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