Final answer:
No, the equation x²+y²=36 does not define y as a function of x.
Step-by-step explanation:
No, the equation x²+y²=36 does not define y as a function of x. In order for an equation to represent a function, each input (x-value) must correspond to exactly one output (y-value). However, in the given equation, for every x-value, there are two possible y-values that satisfy the equation. This can be visualized as a circle with a radius of 6 units centered at the origin.