The translation tells us that we should move the preimage 1 unit to the left and down 2 units.
The quadrilateral should have been translated left 1 unit and down 2 units.
Practice makes perfect
To identify the error, we will perform the translation by ourselves. Then, we will compare our image with the given one. Let's start by considering the rule.
(x,y) → (x - 1, y - 2)
The translation above states that the preimage should be translated to the left 1 unit and down 2 units. Let's do it!
In the given diagram, the error is that the image was translated to the right 1 unit and up 2 units, instead of left and down.
