The correct answer is B: It represents both a relation and a function.

Explanation:

• A relation is any set of ordered pairs, where the first element is from the domain (input) and the second is from the range (output).
• A function is a specific type of relation where each input (x-value) is paired with exactly one output (y-value).

The equation $y = 2^x + 4$ assigns a unique $y$-value to each $x$-value. Therefore, it satisfies the definition of both a relation and a function.

Would you like more details or have any further questions?

Here are 5 related questions:

1. What is the difference between a relation and a function in general?
2. How can you tell if a given equation represents a function?
3. What is the range of the function $y = 2^x + 4$?
4. How does the graph of $y = 2^x + 4$ look?
5. What kind of transformations occur when comparing $y = 2^x$ and $y = 2^x + 4$?

Tip: To test if an equation represents a function, use the vertical line test on its graph. If a vertical line crosses the graph at only one point for all x-values, it is a function.