QuestionDetermine if the following equations define $y$ as a function of $x$: 28. $y=x^{3}$, 31. $y^{2}=4-x^{2}$, $y=|x-3|$.

Studdy Solution
Finally, let's consider the third equation $y=|x-3|$. The absolute value function always gives a non-negative output for any input. Therefore, for every value of $x$, there is exactly one corresponding value of $y$. So, $y$ is a function of $x$ in this equation.