Your friend produced a reflection over the y-axis that looks like this figure you notice a problem with the reflection how do you suggest correcting the reflection
To correct the reflection, you need to reverse the y-coordinate for each point. This can be done by multiplying each y-coordinate by -1.
For example, if a point was originally at (x, y), after reflecting it over the y-axis, it will be at (-x, -y). So, you can suggest to your friend to apply this transformation to each point of the figure they reflected.
If you can provide specific details about the figure or the problem noticed, I can give a more tailored suggestion on how to correct it.