Question

Identify a point, that when graphed on the coordinate system, makes the relation not a function. E X P L A I N.

Answer 1

The coordinates of points in the graph are,

$(-4,-1), (-2,1), (0,-3), (2,3)$
and

$(4,-2)$
Any other point whose first coordinate(the x-co-ordinate) coincides with one of these points will make the relation not a function.

The relation becomes one- to-many relation which is not a function.

It will also fail the vertical line test , if the points are connected with line segments.

One of such point is,

$(4,3)$