Question 1175146: Determine whether the relation represents a function. If it is a function, state the domain and range.
{(-4,11), (-3,4), (0,-5), (3,4), (5,20)}
A. function
domain: {11, 4, -5, 20}
range: {-4, -3, 0, 3, 5}
B. function
domain: {-4, -3, 0, 3, 5}
range: {11, 4, -5, 20}
C. not a function
Found 2 solutions by MathLover1, MathTherapy:
Answer by MathLover1(20850)   (Show Source):
You can put this solution on YOUR website!
How To: Given a relationship between two quantities, determine whether the relationship is a function.
{( , ), ( , ), ( , ), ( ,), ( , )}
Identify the input values.=> domain is ,,,
Identify the output values.=> range is ,,,
If each input value leads to   output value, classify the relationship as a function.
as you can see pairs (,) and (,) two different inputs lead to same output
so, answer is C. not a function
an example:
In the above mapping from C to D, every element of C has an image in D.
But, the element '2' in C has two images (20 and 40) in D. Since the above relation does not meet the second condition, it is not a function.
Answer by MathTherapy(10552)  (Show Source):
You can put this solution on YOUR website!
Determine whether the relation represents a function. If it is a function, state the domain and range.
{(-4,11), (-3,4), (0,-5), (3,4), (5,20)}
A. function
domain: {11, 4, -5, 20}
range: {-4, -3, 0, 3, 5}
B. function
domain: {-4, -3, 0, 3, 5}
range: {11, 4, -5, 20}
C. not a function
She's WRONG, as usual!
Correct answer: 
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