Yes , a relation from set X to set Y is a function .
The correct answer for the completion exercise shown above is: "Goodness of fit test".
Therefore, the complete sentence is shown below: "A goodness of fit test is used to test the hypothesis that an observed frequency distribution fits (or conforms to) some claimed distribution".
The goodness of fit test, which is also known as "GOF" is usefull to know how well the selected distribution fits to the data. The result are usually presented in tables called "Interactive tables".
Answer:
n < 4
Step-by-step explanation:

-3 -3
< 2
divide both sides by 
n < 4
Hope this helps!!!
Answer:
The correct answer would be D
Step-by-step explanation:
You reflect the shape over the Y-Axis
Move all points left 1
Move all points down 2