The range of the following relation: R: {(3, -2), (1, 2), (-1, -4), (-1, 2)} is
A) {-1, 1, 3}
B) {-1, -1, 1, 3}
C) {-4, -2, 2, 2}
D) {-4, -2, 2}

ITS NOT C

Question

The range of the following relation: R: {(3, -2), (1, 2), (-1, -4), (-1, 2)} is  
A) {-1, 1, 3} 
B) {-1, -1, 1, 3}
C) {-4, -2, 2, 2} 
D) {-4, -2, 2} 

ITS NOT C

anonymous · Answer

@dmezzullo

anonymous · Answer

@johnweldon1993

anonymous · Answer

@UnkleRhaukus

unklerhaukus · Answer

its not C because a set doesn't repeat values

anonymous · Answer

ok, but how do I solve this?

unklerhaukus · Answer

the range is all the y's   when the coordinate pairs are { (x_1, y_1), (x_2, y_2), ... }

unklerhaukus · Answer

( but dont repeat if y_2 = y_4,   just use the first one)

anonymous · Answer

im sorry but I don't understand at all. all im getting from what your saying would make the answer -2,2,4,2 but then I have no idea what the second part ment

unklerhaukus · Answer

you have {-2,2,4,2}
but this repeats the value 2 twice,
the set that is the range should not repeat values

anonymous · Answer

so then it would just be -2, 4?

unklerhaukus · Answer

leave one 2 in it

anonymous · Answer

-2, 4, 2? I already had a 2 in it

unklerhaukus · Answer

wait it should be -4 not 4

anonymous · Answer

oh so then its D?

unklerhaukus · Answer

and the order of the elements in a set doesn't matter

unklerhaukus · Answer

Yeah you got it now?

anonymous · Answer

yes thank you

unklerhaukus · Answer

[normally i'd arrange the elements in the set from smallest to largest ]