Which of these relations are functions?

x 2 -2 6 2 -6
y 11 -5 21 15 -15

x 4 -4 7 -7 -4
y 3 -2 11 5 -5

{(-5,-7), (-2,-7), (7,17), (-5,21)}

 None of them are functions.

Step-by-step explanation:

By definition, a relation is a function  if and only if each input value have an unique output value.

You need to remember that the input values are the x-values and the output values are the y-values.

In the first table you can observe that the input value 2 has two different output values:

Therefore, this relation is not a function.

Notice that in the second table the input value -4 has two different output values:

Therefore, this relation is not a function.

In the set , observe that the input value -5 has two different output values:

Therefore, this relation is not a function.

i do not know the answer i am sorry

x > 1.3

step by step:

8.5−0.9x> 9.8−1.9x

step 1: simplify both sides of the inequality.

−0.9x+8.5> −1.9x+9.8

step 2: add 1.9x to both sides.

−0.9x+8.5+1.9x> −1.9x+9.8+1.9x

1x+8.5> 9.8

step 3: subtract 8.5 from both sides.

1x+8.5−8.5> 9.8−8.5

1x> 1.3

step 4: divide both sides by 1.

1x/1 > 1.3/1