Question

which graph shows a dilation? three graphs with coordinate grids and rectangles/squares, each with a radio button

Explanation:

Step1: Define dilation

Dilation preserves shape (similarity) but changes size.

Step2: Check each graph

First graph: Inner rectangle is wider/taller proportionally? No, looks stretched (not similar).
Second graph: Inner square vs outer rectangle—different shapes (not similar).
Third graph: Inner rectangle is smaller, same proportions as outer rectangle (similar).

Answer:

The bottom graph (third graph)