Which set of ordered pairs is not a function?
a. (3, 1), (–1,1), (1, 1), (3, −1)
b. (–3, 1), (–1, 1), (1, 1), (3, 1)
c. (–3, 1), (–1, –1), (1, 1), (3, 1)
d. (–3, 1), (–1, –1), (1, 1), (3, −1)

A.

It isn't a function because if you look at the inputs (x-coordinates) there are two 3 in the x place

step-by-step explanation:

given expression is .

now we need to simplify the given expression .

we know that square root is equivalent to the power 1/2. so that means we can take half of the exponents to get the square root of given expression.

expanding that will give a very very large number so let's keep answer in exponent form.