Final answer:
When the sign of the input in a function is changed, the graph is reflected about the y-axis. For example, if the original graph had a point (2, 3), the new graph will have a corresponding point (-2, 3).
Step-by-step explanation:
When a function f(x) is changed by changing the sign of the input as in f(-x), the graph of the function is reflected about the y-axis.
This means that every point (x, y) on the original graph is transformed to the point (-x, y) on the new graph.
The shape of the graph remains the same, but it is now flipped horizontally.
For example, if the original graph had a point (2, 3), the new graph will have a corresponding point (-2, 3).