SOLUTION: What is the domain (the first element or number, from each pair) of this relation: { (4,1), (5,2), (6,-1), (8,5) } * {4, 5, 6, 8} {4, 5, 6} {-1, 2, -1, 5} {4, -1, 5, 2}

Algebra ->  Equations -> SOLUTION: What is the domain (the first element or number, from each pair) of this relation: { (4,1), (5,2), (6,-1), (8,5) } * {4, 5, 6, 8} {4, 5, 6} {-1, 2, -1, 5} {4, -1, 5, 2}      Log On


   



Question 1086290: What is the domain (the first element or number, from each pair) of this relation:
{ (4,1), (5,2), (6,-1), (8,5) }
*
{4, 5, 6, 8}
{4, 5, 6}
{-1, 2, -1, 5}
{4, -1, 5, 2}

Answer by jim_thompson5910(35256) About Me  (Show Source):
You can put this solution on YOUR website!
Each point is of the form (x,y). The x coordinate is listed first.

The domain is the set of all possible x values of a relation. So it's simply the set of all the x coordinates.

The x coordinates are {4, 5, 6, 8} which is why the answer is choice A