Question

I need help with an algebra question; will give medals.
The range of the following relation: R {(3, -2), (1, 2), (-1, -4), (-1, 2)} is

{-1, 1, 3}
{-1, -1, 1, 3}
{-4, -2, 2, 2}
{-4, -2, 2}

Answer 1

Range = y-axis

(x,y)

But since there are two "2"s in the range we only write one of those "2"s

Answer 2

So the range will only be

R = {-4,-2, 2}

Answer 3

Wait, I don't understand what this means. Sorry.

Answer 4

So the range equals the y-axis, but what does that mean?

Answer 5

ok, you know how coordinates are (x, y)?

The "y" is just another name for range, so I was just saying that they wanted to only know the "y" part and not the "x" part (or domain)

Answer 6

Oh! So, then there are two 2's in the range; I thought there were three?

Answer 7

There is one -2 and two 2s

Answer 8

Oh, yeah. Sorry, my mind is so blank tonight!

Answer 9

Thank you! I understand now, but why is the 4 in the range?

Answer 10

it is part of the y-axis (x, y) - (-1 -4)

Answer 11

Why did we choose -4 for the x?

Answer 12

no, y = range, and the -4 was in the "y"

Answer 13

Alright, thank you!