.the point (-2,3), folded over the y-axis, would end up at (2,3)

Question

the reflecton of a point over the y-axis is where the point would  end up

Answer 1

Yes it would because the y-axis divides the 1st and 2nd quadrants when above the x-axis, and 3rd and 4th quadrants when below the x-axis.  Since your initial point is in the 2nd quadrant, the y coordinate will be the same when you reflected over the y-axis, but the x coordinate will change signs.  This of it as a horizontal reflection.