A. is this mapping diagram a function? why or why not?

b. what is the domain of the mapping diagram?

c. what is the range of the mapping diagram?

40--C   A ---is not[figure it out in your own words,your teacher might suspect something] and B---times 40

Step-by-step explanation:

b--40+40=80   80+40=120 and 120+40=160                A=subtract 40 from all the other answers such as 40-160=120       40-120=80  and 40-80=40

1/5^2 = 7.56/45

it is a. 4.2 because 7.6-3.4 gets the remaining length of 4.2. i might be wrong but i am pretty sure this is the answer.