To find the coordinates of the point \( E' \) after translating point \( E(-9, 8) \) left 13 units and then up 21 units, we can follow these steps:
-
Translate left 13 units:
- To move left, we subtract from the x-coordinate: \[ x' = -9 - 13 = -22 \]
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Translate up 21 units:
- To move up, we add to the y-coordinate: \[ y' = 8 + 21 = 29 \]
Putting it all together, the new coordinates for point \( E' \) are: \[ E' = (-22, 29) \]
So, \( E' = (-22, 29) \).