The average(mean) of this data set is 5.56.
It will be 80 because 80/4=20 and 20+80=100
Answer:

Step-by-step explanation:

Answer: Hello, I saw another picture and i think it was A
Step-by-step explanation: Vertical Line test will determine if a graph is a function or not
Answer:
one is not linear
Step-by-step explanation: