The table shows the outputs, y, for different inputs, x: Input (x)
8
12
14
16
Output (y)
8
12
16
16

Part A:Do the data in this table represent a function? Justify your answer.

Part B: Compare the data in the table with the relation f(x) = 8x − 5. Which relation has a greater value when x = 8?

Part C: Using the relation in Part B, what is the value of x if f(x) = 19?