Final answer:
For an even function, the second point will have the same y-coordinate but the opposite x-coordinate as the given point. For an odd function, the second point will have the opposite x-coordinate and the opposite y-coordinate as the given point.
Step-by-step explanation:
An even function is symmetric about the y-axis, which means that if a point (x,y) is on the graph of an even function, then the point (-x,y) is also on the graph. So, if the point (9,-9) is on the graph of an even function, then the point (-9,-9) is also on the graph.
An odd function is generated by reflecting the function about the y-axis and then about the x-axis. This means that if a point (x,y) is on the graph of an odd function, then the point (-x,-y) is also on the graph. So, if the point (9,-9) is on the graph of an odd function, then the point (-9,9) is also on the graph.