the shape DEF went to the right along the x axis wich <em>increased</em> x and then went down the y axis or <em>decreased </em>y to make D'E'F'
some good way to remember these translations and orders are... - x is first when plotting points, then y (x, y) - x increases going right, and decreases going left, as well as y increasing going up, then decreasing going down
BONUS FACT: the symbol ( ' ) is called a prime when refering to transformations and geometry ((as in D' is pronounced D prime))