Question

If $G$ represents the name of the function in above graph, then $G$ is a/an

• A. identity function
• B. constant function
• C. modulus function
• D. None of these

Answer 1

Answer: (B)

Constant function Define the function $f: R \rightarrow R$ by $y=f(x)=c, x \in R$, where $c$ is a constant. Here, domain of $f$ is $R$ and its range is $\{c\}$.

e.g. The graph of $f(x)=3$, is a line passing through $(0,3)$ and parallel to $X$-axis.