Transformation Rule: $(x, y) \rightarrow$ \begin{tabular}{|l|l|} \hline $\begin{array}{c}\text { Preimage Coordinates } \\ (x, y)\end{array}$ & \multicolumn{1}{c|}{ Image } \\ \hline$(2,-1)$ & $(-2,0)$ \\ \hline$(2,-3)$ & $(-2,-2)$ \\ \hline$(4,-3)$ & $(0,-2$ \\ \hline \end{tabular}

Step 1 ：Observe the given preimage and image coordinates.

Step 2 ：Identify the transformation rule by comparing the preimage and image coordinates.

Step 3 ：The transformation rule seems to be a combination of translation and reflection. The x-coordinate is reflected over the y-axis (multiplied by -1) and the y-coordinate is translated up by 1 unit.

Step 4 ：Test the transformation function with the given preimage coordinates to see if it produces the correct image coordinates.

Step 5 ：The transformation function is producing the correct image coordinates for the given preimage coordinates.

Step 6 ：Therefore, the transformation rule is correct.

Step 7 ：Final Answer: The transformation rule is \(\boxed{(x, y) \rightarrow (-x, y+1)}\).