Answer:
g(x) is the reflection of f(x) through the y-axis.
Explanation:
Given : Functions
and

To find : How are the two functions related to each other?
Solution :
When we examine the two function,
and

We see that x-coordinate in g(x) is negative which signifies that it will be reflected through y-axis.
Therefore, the functions are related to each other as g(x) is the reflection of f(x) through the y-axis.