Let's solve the problems step by step based on the questions shown in the image:

1. Tentukan bayangan titik $A(2, -5)$ oleh pencerminan terhadap garis $y = -x$

• Solution: The reflection of a point $(x, y)$ over the line $y = -x$ is given by swapping and negating both coordinates: $(-y, -x)$.

  So for $A(2, -5)$: $\text{Reflection of } A(2, -5) \text{ over } y = -x = (5, -2)$

  Answer: The reflection of point $A(2, -5)$ is $(5, -2)$.

2. Berapakah hasil refleksi atau pencerminan bidang datar dari titik $(3, 5)$ terhadap sumbu y?

• Solution: The reflection of a point $(x, y)$ over the $y$-axis is done by changing the sign of the $x$-coordinate while keeping the $y$-coordinate the same. So for $(3, 5)$: $\text{Reflection over } y \text{ axis} = (-3, 5)$

  Answer: The reflection of point $(3, 5)$ over the $y$-axis is $(-3, 5)$.

3. Bayangan titik $A(2, 5)$ yang direfleksikan terhadap sumbu y adalah

• Solution: Similar to question 2, the reflection over the $y$-axis is achieved by changing the sign of the $x$-coordinate: $\text{Reflection of } A(2, 5) \text{ over the } y \text{ axis} = (-2, 5)$

  Answer: The reflection of point $A(2, 5)$ over the $y$-axis is $(-2, 5)$.

Would you like further details on any of the solutions, or do you have any questions? Here are some related questions to expand your understanding:

1. How do you reflect a point over the line $y = x$?
2. What is the reflection of point $(4, -3)$ over the $x$-axis?
3. How do you find the reflection of a point over a generic line $y = mx + c$?
4. What is the reflection of point $(-2, -3)$ over the origin?
5. Can a reflection result in the same point in any scenario?

Tip: When reflecting over the $y = -x$ line, always remember to swap and negate the coordinates!