SOLUTION: Which of these sets represents a function, [(-1, 8), (5,7),(5rr)] [(7,3),(5,-2),(4,3)] Both or neither This is all information given Thanks

Algebra ->  Finance -> SOLUTION: Which of these sets represents a function, [(-1, 8), (5,7),(5rr)] [(7,3),(5,-2),(4,3)] Both or neither This is all information given Thanks      Log On


   



Question 1191121: Which of these sets represents a function, [(-1, 8), (5,7),(5rr)] [(7,3),(5,-2),(4,3)]
Both or neither
This is all information given
Thanks

Answer by MathLover1(20850) About Me  (Show Source):
You can put this solution on YOUR website!
[(-1, 8), (5,7),(5rr)] -> here must be mistake with last ordered pair (5rr)
[(7,3),(5,-2),(4,3)]

A function is a special relationship where each input has a single output. A relation is a function, if and only if, the x- values do not repeat in a given set.

The set [(7,3),(5,-2),(4,3)] :
Function Check:
x|y|Occurrences of x
7|%09++3|%09++1
+5|%09++-2|%09++1
4|%09++3|%09++1
Because all of our x values are unique, the set of ordered pairs is a function
The Domain is just the input values
Domain = (7, 5, 4)
The Range is just the input values
Range = (3, -2)