What type of number is 0? rational, irrational, whole number, integer

It is a rational number, whole number, and an integer.

Integers include the set of whole numbers which are {0, 1, 2, 3, 4, ...} and their negative counterparts which are {-1, -2, -3, -4 ...}.

Since 0 is an integer, it's rational because all integers are rational numbers.

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.