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}

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}

amistre64 · Answer

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

amistre64 · Answer

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

amistre64 · Answer

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

amistre64 · Answer

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

amistre64 · Answer

that means C is out

anonymous · Answer

So is it D?

amistre64 · Answer

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

anonymous · Answer

Okay, thank you very much.

amistre64 · Answer

yw :)