To find the coordinates of the translated point \( Y' \) after moving the original point \( Y(-4, 1) \) down 3 units and to the right 8 units, we can follow these steps:
-
Translate down 3 units:
- This means we subtract 3 from the y-coordinate. \[ y = 1 - 3 = -2 \]
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Translate to the right 8 units:
- This means we add 8 to the x-coordinate. \[ x = -4 + 8 = 4 \]
Combining these results, the new coordinates of point \( Y' \) are: \[ Y' = (4, -2) \]
So, the answer is: \[ \boxed{(4, -2)} \]