Answer: yes is it a function
Step-by-step explanation:
A graph is a function when there is only one y value for each x value. You can also use the vertical line test. This example is a “quadratic function”.
Answer:

Step-by-step explanation:
The answer that you're looking for is B
Answer:
<h2>POINT</h2>
Step-by-step explanation:
Of all the terms mentioned, only one of them is undefined, and that's a point.
Other terms have their own definitions (are defined).