Question

What is the domain of the inverse of a relation?

Answer 1

If say a relation has a value pairs of say 

(a,b),(c,d),(e,f),(g,h),(i,j)

the the value pairs for its inverse will be

(b,a),(d,c),(f,e),(h,g),(j,i)


notice, is the same pair, but flipped sideways.

and of course, the domain is the set of the x-values or the x-coordinate or the first value of each pair, as you already should know.

Answer 2

The domain is the space between the end points on the x axis
ex: D:-2(<=)x(<=)4 this means that the domain is any numbers between -2 and 4