The circle graph and parabola graph do not represent the function because they both fail the vertical line test option (A) and (C) are correct.
What is a function?
It is defined as a special type of relationship, and they have a predefined domain and range according to the function every value in the domain is related to exactly one value in the range.
Since a circle fails the vertical line test, it cannot be a function. In other words, we can create a vertical line that crosses a circle's graph more than once.
Not every parabola is a function. Only parabolas with upward or downward openings are regarded as functions.
Thus, the circle graph and parabola graph do not represent the function because they both fail the vertical line test option (A) and (C) are correct.
Learn more about the function here:
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