Question

When you multiply -1, what is the effect on its graph

Answer 1

When you multiply the input of a graphed equation by -1, the graph will be mirrored over the x-axis.

This is because all positive outputs (y values) become negative, and all negative outputs become positive; thus, resulting in the mirror over the x-axis as it represents a change in sign.

Let me know if you need any clarifications, thanks!

~ Padoru