In which choice is \( y \) a function of \( x \) ? A \( (0,3),(3,1),(1,3),(3,8) \) B \( (2,9),(5,6),(8,3),(10,1) \) C \( (4,7),(8,2),(4,0),(0,3) \) D \( (6,6),(7,7),(8,8),(6,8) \)

To determine if y is a function of x, we must ensure that each x-value appears only once with one corresponding y-value. Option A: The ordered pairs are (0,3), (3,1), (1,3), (3,8). Here, x = 3 appears twice (with y = 1 and y = 8), so it is not a function. Option B: The ordered pairs are (2,9), (5,6), (8,3), (10,1). Each x-value (2, 5, 8, 10) is unique, so y is a function of x. Option C: The ordered pairs are (4,7), (8,2), (4,0), (0,3). Here, x = 4 appears twice (with y = 7 and y = 0), so it is not a function. Option D: The ordered pairs are (6,6), (7,7), (8,8), (6,8). Here, x = 6 appears twice (with y = 6 and y = 8), so it is not a function. Therefore, only Option B represents y as a function of x.