Swapping & Negating: Problem Solving & Reasoning

Mathematics
Year 9
10 questions
~20 mins
1 views0 downloads

About This Worksheet

A worksheet exploring Swapping & Negating in the context of Reflection across y=-x, designed to develop procedural skills and reasoning.

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Swapping & Negating: Problem Solving & Reasoning

Subject: MathematicsGrade: Year 9
Name:
Date:
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Untitled Worksheet

Grade Year 9
A

Practice Questions

Answer all questions. Show your working in the grid spaces provided.
1.
Reflect the point (3, -5) across the line y = -x. What are the coordinates of the reflected point?
[2 marks]
2.
Given the point (-2, 4), perform the swapping and negating process to find its reflection across y = -x.
[3 marks]
3.
Plot the graph of y = 2x and then reflect the point (1, 2) across y=-x. Describe the steps and draw the reflected point on the grid.
[3 marks]
4.
Construct a triangle with vertices at (2, 3), (4, -1), and (0, 0). Reflect the entire triangle across y = -x. State the new coordinates of each vertex.
[4 marks]
5.
A point moves from (5, -2) to its reflection across y = -x. Is the new point obtained by swapping the coordinates and negating the new x-coordinate? Explain.
[2 marks]
6.
Identify the error: The point (7, -4) reflected across y=-x is at (4, -7). Is this correct? If not, correct the mistake.
[2 marks]
7.
If a point is at (-6, 3), what is its reflection across y=-x? Show your working.
[2 marks]
8.
A real-world scenario: A drone's position is at (4, -3). It needs to reflect its position across y = -x to navigate to a new point. What are the new coordinates?
[3 marks]
9.
Challenge: Find a point on the grid that, when reflected across y=-x, lands at (2, -8). What is the original point?
[3 marks]
10.
Mixed review: Reflect the point (0, -7). Describe the steps involved and provide the reflected point.
[2 marks]

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Details

Created
1/1/2026
Updated
1/1/2026
Type
worksheet