Answer:
Eakins used photographs as a teaching tool with students.
Eakins traced subjects in photographs to make some paintings.
Eakins used photographs to study the human body and the phases of action.
Step-by-step explanation:
The only think Eakins never did was paint directly onto photographs to make paintings.
He did use photographs as references for human anatomy and movement. He used some of the photographs as the direct inspiration for tracing human figures, but more often he would use it as a study of human poses, gestures, movements, and actions.
Eakins also encouraged his students to do the same and used photography as the teaching tool.