Questions: Determine whether the following equation defines y as a function of x x^2 + y^2 = 144 Does the equation x^2 + y^2 = 144 define y as a function of x?

Determine whether the following equation defines y as a function of x

x^2 + y^2 = 144

Does the equation x^2 + y^2 = 144 define y as a function of x?
Transcript text: Determine whether the following equation defines y as a function of $x$ \[ x^{2}+y^{2}=144 \] Does the equation $x^{2}+y^{2}=144$ define $y$ as a function of $x$ ?
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Solution

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Solution Steps

Step 1: Rearrange the equation to solve for y

To determine if the equation \(f(x, y) = 144\) defines \(y\) as a function of \(x\), we first attempt to rearrange the equation to express \(y\) in terms of \(x\), i.e., \(y = g(x)\).

Step 2: Check for uniqueness of y for each x

After rearranging, we need to check if for every value of \(x\), there is exactly one corresponding value of \(y\). This is crucial because the definition of a function requires that each input \(x\) maps to exactly one output \(y\).

Step 3: Consider the domain of x

It's also important to consider the domain of \(x\), especially if rearranging for \(y\) involves operations that restrict the domain of \(x\). For instance, operations like square roots require non-negative arguments.

Step 4: Edge Cases

Final Answer:

Based on the rearrangement and analysis, if for every value of \(x\) there is exactly one corresponding value of \(y\), and considering the domain of \(x\), \(y\) can be considered a function of \(x\). Otherwise, \(y\) is not a function of \(x\).

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