Answer the question in french:
you may copy and paste the accented characters from this list if needed:
àà ââ ää çç éé èè êê ëë îî ïï ôô œœ ùù ûû üü

c'est la fille de ma mère mais ce n'est pas moi, qui est-ce ? ma

The horizontal blue line through the middle of the lens is called the optical axis. as the lamp is moved above or below the axis, keeping the horizontal distance to the center of the lens constant, how does the horizontal distance from the lens to the image change?