Help help help help pls

A. all of them

Step-by-step explanation:

In a function, every x in a (x,y) pair can have only one distinct y value.

This seems to be the case in the given sets of pairs.

A

Step-by-step explanation:

A function is any relation for which an input does not equal two different outputs. For instance, if a set contains (1, 1) and (1, 2), then the set is not a function. However, a set that contains (1,1) and (1,1) is a function because it's the same thing. In other words, the x-coordinate cannot repeat. If it does, it must equal to same thing.

For W, none of the x-coordinates are repeated. Thus, W is a function.

Similarly, for X, none of the x-coordinates are repeated either. X is a function.

Again, for Y, none of the x-coordinates are repeated. Y is a function.

Lastly, for Z, the same thing. None of the x-coordinates are repeated, so Z is a function.

Thus, all choices are a function. The answer is A.

afjnawenkfnjaw; enkanwelwaklalejjaw; fij

step-by-step explanation:

{x = -1/2 ,   y = -1

step-by-step explanation:

solve the following system:

{2 x + y = -2

{10 x - 3 y = -2

in the first equation, look to solve for y:

{2 x + y = -2

{10 x - 3 y = -2

subtract 2 x from both sides:

{y = -2 x - 2

{10 x - 3 y = -2

substitute y = -2 x - 2 into the second equation:

{y = -2 x - 2

{10 x - 3 (-2 x - 2) = -2

10 x - 3 (-2 x - 2) = (6 x + 6) + 10 x = 16 x + 6:

{y = -2 x - 2

{16 x + 6 = -2

in the second equation, look to solve for x:

{y = -2 x - 2

{16 x + 6 = -2

subtract 6 from both sides:

{y = -2 x - 2

{16 x = -8

divide both sides by 16:

{y = -2 x - 2

{x = -1/2

substitute x = -1/2 into the first equation:

{y = -1

{x = -1/2

collect results in alphabetical order:

answer:   {x = -1/2 ,   y = -1