Answer:
A
Step-by-step explanation:
X values cannot repeat in a function, 3 is used as an X value twice in A, and therefore cannot be a function.
If this is graphed, you can use the vertical line test, if a vertical line on any point goes through other points, it is not a function.
In this case, just check if X repeats.
300 dollars would be the independent variable and 50 dollars a week is dependent
If the traslation is T(x,y)=(x-1,y+1) then:

Therefore A'=( -7,3).
The first answer is 25x + 45 = c
The second one is y=3x
Hopes this helps