To translate point \( C \) horizontally by \(-4\) and vertically by \(+3\), we will adjust the coordinates of point \( C \) accordingly.
Point \( C \) has the coordinates \( (-5, 1) \).
-
Horizontal Translation:
- To translate horizontally by \(-4\), we subtract \(4\) from the \(x\)-coordinate of point \( C \): \[ -5 - 4 = -9 \]
-
Vertical Translation:
- To translate vertically by \(+3\), we add \(3\) to the \(y\)-coordinate of point \( C \): \[ 1 + 3 = 4 \]
Now we can combine these results to find the new coordinates of \( C' \): \[ C' = (-9, 4) \]
Thus, the coordinates of \( C' \) after the translation are \(\boxed{(-9, 4)}\).