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dentify Functions and the Vertical Line Test 10 Determine whether the following relation is a function. Type either "function" or "not function" in the space below. \( \{(-8,1)(-2,-4)(-2,5)(0,5)(3,-3)\} \) Enter the answer Check It \( \times \)

Ask by Crawford Chen. in the United States
Mar 11,2025

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Answer

The relation is **not a function** because the x-value \(-2\) corresponds to two different y-values.

Solution

To determine whether the given relation is a function, we can use the definition of a function: a relation is a function if every input (or x-value) corresponds to exactly one output (or y-value). Let's analyze the given relation: \[ \{(-8,1), (-2,-4), (-2,5), (0,5), (3,-3)\} \] Now, we will check the x-values: - The x-value \(-8\) corresponds to \(1\). - The x-value \(-2\) corresponds to both \(-4\) and \(5\). - The x-value \(0\) corresponds to \(5\). - The x-value \(3\) corresponds to \(-3\). Since the x-value \(-2\) has two different corresponding y-values (\(-4\) and \(5\)), this means that the relation does not satisfy the definition of a function. Thus, the answer is: **not function**

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To determine whether the given relation is a function, we can apply the Vertical Line Test. A relation is a function if no vertical line intersects the graph of the relation at more than one point. In this case, the coordinates \((-2, -4)\) and \((-2, 5)\) both share the same x-value of \(-2\) but have different y-values. Therefore, a vertical line at \(x = -2\) would intersect at two points, indicating this relation is not a function. The answer is: not function. To further illustrate, think of a function as a vending machine: you press a button (the input), and only one specific snack (the output) is dispensed. If a button could deliver multiple snacks, that would be a chaotic vending machine! In our case, the x-value “-2” trying to give you two different y-values is just as confusing—hence, it’s a "not function" scenario.

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