To determine if the relation \( y = 2x^3 \) is a function, we need to remember that a relation is a function if every input corresponds to exactly one output.
Given the equation \( y = 2x^3 \), for every value of \( x \) there is a unique value of \( y \). For example:
- If \( x = 2 \), then \( y = 2(2^3) = 2(8) = 16 \).
- If \( x = 4 \), then \( y = 2(4^3) = 2(64) = 128 \).
- If \( x = 3 \), then \( y = 2(3^3) = 2(27) = 54 \).
- If \( x = 2 \) (again), \( y = 16 \) (as calculated before).
Since for every input \( x \) there is only one corresponding output \( y \), the relation is indeed a function.
So the answer is: Function.