Final answer:
The image point of (8, -9) after the transformation Ry=-x D2 is (-8, -9).
Step-by-step explanation:
The given transformation is Ry=-x D2. To find the image point of (8, -9) after this transformation, we need to substitute the coordinates into the transformation equations.
Substituting x = 8 into the equation Ry=-x, we get Ry = -8. Similarly, substituting y = -9 into the equation D2, we get D2 = -9.
Therefore, the image point after the transformation is (-8, -9).