Answer:
A'={5,0}
B'={2,0}
C'={2,4}
Explanation:
The coordinates of the object triangle are;
A = {-3,0}
B= {0,4}
C={0,0}
The reflection is on line x=1
See attached graph with the image for the coordinates of the triangle after reflection
A'={5,0}
B'={2,0}
C'={2,4}