1. Which of the sets of ordered pairs represents a function?
A = {(1, –2), (3, –5), (5, 2), (7, 5)}
B = {(4, 2), (4, –2), (9, 3), (9, –3)}

Question

1. Which of the sets of ordered pairs represents a function?
A = {(1, –2), (3, –5), (5, 2), (7, 5)}
B = {(4, 2), (4, –2), (9, 3), (9, –3)}

openstudier · Answer

A function is represented by a set of values where every x-value corresponds to EXACTLY one y-value.

mathmale · Answer

Right.  so, if you see that a single x value has 2 or more y values connected with it, then the set of ordered pairs does not represent a function.

richgall____ · Answer

okay

richgall____ · Answer

@mathmale i plotted them on the graph and they aren't in a straight so doesn;t that mean it's not a function?

richgall____ · Answer

@pooja195

anonymous · Answer

check to see which one has no repeats in the first (the  $x$ )coordinate
that is all
if has not repeated x values, then it is a function 
if it has repeated x values, it is not

richgall____ · Answer

yea in A only X shows a pattern not the y values though @satellite73

richgall____ · Answer

And in B, the same numbers repeat but they have different values