If the no x-values repeat, yes it is a function so far I see it is a function.
Answer: B
Reason:
44 + x 
66
x 22
Also when we have a greater and equal to sign (), it will be a filled in circle.
Thats why its by.
Answer:
The square root function
sqrt(144) or √144 produces a single positive value, 12.
However if you have an equation
x² = 144, then you have two possible values for x, 12 and -12.
Two ways to look at it.
x² - 144 = 0
Difference of two squares
(x+12)(x-12) = 0
x = -12, 12
x² = 144
x = ±√144
x = ±12
x = -12, 12
You made the choice to choose the letter A, a second time.
