Question

The domain of the following relation: R: {(-4, 3), (3, 6), (-2, 1), (3, 6)} is

A {-4, 3, -2, 3}
B No domain exists
C {1, 3, 6}
D {-4, -2, 3}

Answer 1

duplicating numbers is never proper when defining a set; so A is out

Answer 2

The Domain is usually defined as the first entry in an ordered pair: (D,R)

Answer 3

Since we actually have points to plot; a domain exists so B is out

Answer 4

and we have a -4 in the first spot so our domain must include a -4 .....

Answer 5

that means C is out

Answer 6

So is it D?

Answer 7

unless youve got some other options hiding in the back; i do believe D is the only option left to us.

Answer 8

Okay, thank you very much.

Answer 9

yw :)