Question

List the values that make up the domain of this relation.

(5,3) (2,-7) (1,-8) (8,3)
D={______,______,_____,____}

Answer 1

`\bf (\stackrel{\downarrow }{5},3),(\stackrel{\downarrow }{2},-7),(\stackrel{\downarrow }{1},-8),(\stackrel{\downarrow }{8},3)\qquad \quad \stackrel{\textit{the domain is always the set of the 1st coordinate}}{(5,2,1,8)}`