Question 3 (Multiple Choice, Worth 2 points)

The following points represent a relation where [tex]x[/tex] represents the independent variable and [tex]y[/tex] represents the dependent variable.

[tex]
\left(\frac{3}{4}, -2\right), (1, 5), (-2, -7), \left(3, -\frac{1}{2}\right), (6, 6)
[/tex]

Does the relation represent a function? Explain.

A. No, because for each input there is not exactly one output.
B. No, because for each output there is not exactly one input.
C. Yes, because for each input there is exactly one output.
D. Yes, because for each output there is exactly one input.



Answer :

To determine whether the given relation represents a function, we need to check whether each input (independent variable [tex]\(x\)[/tex]) has exactly one output (dependent variable [tex]\(y\)[/tex]).

We are given the following points:
[tex]\[ \left(\frac{3}{4}, -2\right),\ (15, 2),\ (-2, -7),\ \left(3, -\frac{1}{2}\right),\ (6, 6) \][/tex]

### Step-by-Step Solution:
1. List the x-values (independent variables) from each ordered pair:
[tex]\[ \frac{3}{4},\ 15,\ -2,\ 3,\ 6 \][/tex]

2. Check for repeating x-values:
- The x-values are [tex]\(\frac{3}{4}\)[/tex], [tex]\(15\)[/tex], [tex]\(-2\)[/tex], [tex]\(3\)[/tex], and [tex]\(6\)[/tex].
- There are no duplicates among these x-values.

3. Determine if the relation is a function:
- In a function, each unique input (x-value) corresponds to exactly one output (y-value).
- Since all x-values are unique and there are no repeated x-values, each input [tex]\(x\)[/tex] has exactly one output [tex]\(y\)[/tex].

### Conclusion:
- Since each input has exactly one output, the relation does represent a function.

Therefore, the correct answer is:
Yes, because for each input there is exactly one output