The image of the triangle before and after dilation is attached
What is effect of dilation with negative dilation factor
When a dilation is performed with a negative dilation factor, it has the effect of not only scaling the figure but also reflecting it across the center of dilation.
The figure is not only resized but also flipped
The image attached shows the image of the triangle and the dilated image. The dilated image (L'M'N') is enlarged and flipped. The flip is introduced because of the negative dilation factor