Which describes an important difference between onshore and offshore wind farms? Offshore wind farms are much quieter.
Offshore wind farms cost less to construct.
Offshore wind farms produce more electricity.
Offshore wind farms cause less pollution.

Explanation:

guessing that Offshore wind farms produce more electricity

. a function is a relation in which each input has only one output. in the relation , y is a function of x, because for each input x (1, 2, 3, or 0), there is only one output y. x is not a function of y, because the input y = 3 has multiple outputs: x = 1 and x = 2.

where is the graph?

i only can answer with a graph!