The y-coordinate of point B" is -5
Step-by-step explanation:
Let us revise the reflection over the axis
- If point (x , y) reflected across the x-axis , then its image is (x , -y) , the rule of reflection is rx-axis (x , y) → (x , -y)
- If point (x , y) reflected across the y-axis , then its image is (-x , y) , the rule of reflection is ry-axis (x , y) → (-x , y)
∵ A = (8 , 1)
∵ B = (-2 , 5)
∵ Line AB is reflected over the x-axis
- Reflection over x-axis changes the sign of y-coordinate
∴ A' = (8 , -1)
∴ B' = (-2 , -5)
∵ The line A'B' is reflected over the y-axis
- Reflection over y-axis changes the sign of x-coordinate
∴ A'' = (-8 , -1)
∴ B" = (2 , -5)
The y-coordinate of point B" is -5
Learn more:
You can learn ore about the transformation in brainly.com/question/5017530
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