Triangle PQR with vertices P(-4,9) Q(-3,3) R(3,10) and scale factor of k=2 and center of dilation (-2,7)

thats not a system of equations, that is a solution

ca = ec

cpctc makes it so that corresponding parts of the triangle you proved to be equal are equal, the other options aren't part of the part of the triangles you proved to be equal.

i dont know what you want me to answer for this but im guessing 2: 11?