Answer:
A function gives for each element of the domain only one element of the range.
Explanation:
We have to choose from the statements in the options that define a function correctly.
From my point of view the statement that a function gives for each element of the domain only one element of the range, defines a function properly.
Geometrically it represents that if we draw a vertical line in the graph of the function that intersects the graph at more than one points then this is not a function, this is only a relation. (Answer)