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?
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 $x$ ?
Solution
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 \(x\).