ΔABC is dilated by a scale factor of 3 with the origin as the center of dilation to form ΔA′B′C′. The slope of is -1.2. The length of is p units, the length of is q units, and the length of is r units. The slope of is . The length of is units.

Step-by-step explanation:

Dilation is not a rigid transformation, for it is not an isometry, hence a dilation produces similar and not congruent figures.

If we have to dilate a with  scale factor of 3, with this centered at its origin,with its sides p, q and r. We'll have having 3p,3q, 3r.

The slope in a Dilation is considered carefully when it is not dilated at its center. Well it is. And we're not dilating line segments, then it'll look like this (check below)

So its line segments will be thrice the value of its original triangle as well.