Step by step
The question
Question: translate the shape A(2, −1), B(5, −1) and C(2, −3) left 3, up 4.
1 Draw the shape
Put the points on the grid and join them.
2 Read the move
Left 3 means x gets 3 smaller: x − 3.
Up 4 means y gets 4 bigger: y + 4.
So every point (x, y) goes to (x − 3, y + 4).
3 Move each point
Start at A.
Go left 3.
Then go up 4.
We land on the new point.
We call the new point A prime.
The little mark means: the new A.
A is (2, −1).
Left 3: 2 minus 3 is −1.
Up 4: −1 plus 4 is 3.
So A' is (−1, 3).
Careful!
Left makes x smaller.
So we take 3 away.
We do not add it.
Now B: 5 minus 3 is 2.
−1 plus 4 is 3.
So B' is (2, 3).
Now C: 2 minus 3 is −1.
−3 plus 4 is 1.
So C' is (−1, 1).
4 Draw the image
Join the new points.
This new shape is called the image.
So the image is A'(−1, 3), B'(2, 3) and C'(−1, 1).
5 Check
Let's check.
Draw an arrow from each point to its new point.
All the arrows are the same: the same length, the same way.
So the shape slid, without turning.
Right!
Let's look back.
First: draw the shape.
Then: read the move.
Then: move each point.
Then: draw the image.
Last: check.