What is the answer to this question

second option.

Step-by-step explanation:

The formula that is used to calculate the perimeter of a square is:

Where s is the lenght of any side of the square.

To know the lenght of a side of this square, you need to use the formula for calculate the distance between two points:

Let's choose the points of the vertices A and B and substitute them into the formula:

Substituting into , you get:

option 1 is correct.

step-by-step explanation:

y varies inversely with x and constant of variation is 4

the equation will be:

y = k/x

where k =4 so,

y = 4/x

if we put values of x of option 1 in the above equation and find values of y

y = 4/-2 => y =-2

y = 4/-1 => y = -4

y = 4/1 => y = 4

y = 4/2 => y =2

so, all the values of x and y are correct.

if we put values of x given in other options and find value of y we cannot find whole table satisfying the equation.

hence option 1 is correct.