A triangle is translated using the rule [tex]\((x, y) \rightarrow (x-4, y+1)\)[/tex]. How is the figure moved?

A. Four units left and one unit down
B. Four units left and one unit up
C. One unit right and four units down
D. One unit right and four units up



Answer :

To determine how the triangle is translated, we need to apply the given translation rule to the coordinates [tex]\((x, y)\)[/tex]. The rule provided is [tex]\((x, y) \rightarrow (x-4, y+1)\)[/tex].

Let's break down this rule:
- For the [tex]\(x\)[/tex]-coordinate: [tex]\(x-4\)[/tex]
- This means we are subtracting 4 from the original [tex]\(x\)[/tex]-coordinate, which translates the point 4 units to the left.
- For the [tex]\(y\)[/tex]-coordinate: [tex]\(y+1\)[/tex]
- This means we are adding 1 to the original [tex]\(y\)[/tex]-coordinate, which translates the point 1 unit up.

Therefore, the translation rule indicates that the triangle is moved four units to the left and one unit up.

Thus, the correct description of the movement is:
- "four units left and one unit up."

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