Answer: The answer is (B) This is the graph of a function, but it is not one-to-one.
Step-by-step explanation: We are given a graph and four options out of which we are to select the statement that best describes the given graph.
Since the graph of a linear function is a straight line, so the first option is not correct.
The given graph is of a function because for a particular value of y, there is a fixed value of ‘x’.
Also, since there are two different values of x having same value for y, so the function is not one-to-one. For example, If y = f(x) is the function, then f(1.5) = f(-1) = 3.
Therefore, the graph represents a function, but it is not one-to-one.
Thus, the correct option is (B).