Answer:
Data A - 5
Data B - 5
Data C - 5
Data D - 6
Step-by-step explanation:
Data A,
Graph for the data shows that there is a distinct value of y (output value) for every input value of x.
Therefore, Data A is a function.
Data B,
Each ordered pair shows exactly one output value for each input value.
Therefore, Data B represents a function.
Data C,
For each input value there is exactly one output value.
Therefore, Data C represents a function.
Data D,
From the given table,
For x = -1 there are two output values y = 27, 39
For x = -2 output values are y = 45, 21
Since for these input values there are two output values, Data D will not be a function.
