Step by step
The question
Question: translate the point P(0, 2) left 3, down 1.
1 Draw the shape
Put the point on the grid.
2 Read the move
Left 3 means x gets 3 smaller: x − 3.
Down 1 means y gets 1 smaller: y − 1.
So every point (x, y) goes to (x − 3, y − 1).
3 Move each point
Start at P.
Go left 3.
Then go down 1.
We land on the new point.
We call the new point P prime.
The little mark means: the new P.
P is (0, 2).
Left 3: 0 minus 3 is −3.
Down 1: 2 minus 1 is 1.
So P' is (−3, 1).
Careful!
Down makes y smaller.
So we take 1 away.
We do not add it.
4 The new point
So the image is P'(−3, 1).
5 Check
Let's check.
Draw an arrow from each point to its new point.
The arrow goes left 3, down 1.
Right!
Let's look back.
First: draw the shape.
Then: read the move.
Then: move each point.
Then: the new point.
Last: check.