U varies inversely which means p³ will come as a denominator of the constant k.
Therefore, The equation formed will be:

Hmmm I'd say the center of the circle will end up at the center of the triangle, namely the
Centroid of the triangle circumscribed in the circle.
Answer:
Part A :
The scale factor of the dilation that transforms triangle PQR to triangle P'Q'R' is divided by 3.
Part B :
P"(-1,2), Q"(0,3), R"(1,0)
Part C :
Triangle PQR and P"Q"R" are not congruent because congruent means equal and similar but triangle PQR and P"Q"R" are proportional because they are rational to each other but do not have the same measures of sides but the angles are congruent.
This is the graphing of the triangle.