Axel used the vertical line test on this graph, and decided it is a function because the vertical line only passes through one point, (3, 0).
On a coordinate plane, a circle is centered around (0, 0). A vertical line touches the edge of the circle at (3, 0).
Is Axel’s statement correct?
Yes, because the vertical line shows that an input has exactly one output.
Yes, because only one vertical line can be drawn for the test.
No, because the relation does not pass the vertical line test for every possible input.
No, because he drew a horizontal line rather than a vertical line.