Determine whether the relation is a function. Explain. {(3, 9), (4, 8), (–7, 4), (0, 4), (2, 4), (3, 5), (–3, 8)} a. Yes, each x-value is paired with exactly one y-value. b. No, there is a y-value paired with more than one x-value. c. No, there are no negative y-values. d. No, there is an x-value paired with more than one y-value.