Use the formula

In this case:

You should get -3 when you simplify further.
Answer:
i think c im not positive
Step-by-step explanation:
Label the bottom graph with the numbers in the x column and on the side label it with the numbers in the y column and then just dot it
Answer:
Answer: 67.97%
Step-by-step explanation: BEWARE: THE ANSWER IS NOT 39.56%.