Algebra-2

To determine which point can be added so that the set of points still represents a function, we need to ensure that no two points have the same x-coordinate. This is because, for a relation to be a function, each input (x-coordinate) must map to exactly one output (y-coordinate).

We need to check each option to see if its x-coordinate is already in use:

Option A. (-20, 6): x = -20 (already in th...