The mapping shows a relationship between x and y. -3 3 3 5 Which statement is true of the mapping? (8.5G) O A y is not a function of x, since the y-value 3 corresponds to two different x-values. By is a function of x, since the y-valués do correspond to exactly one x-value. Ocy is not a function of x, since the x-values do not correspond to exactly one y-value. . OD y is a function of x, since the x-values do correspond to exactly one y-value.
