Part 1:
Reflection is a type of transformation that flips a shape in a mirror line (also called a line of reflection) so that each point is the same distance from the mirror line as its reflected point. E.g. Triangle P has been reflected in the line x = 4 x=4 x=4 to give Triangle Q.
Part 2:
1,10) is the glide reflection of point A(-5,-4).