To provide accurate responses for your questions about the graph, I'd need to know more details about the graph itself, such as the characteristics of triangles ABC and DEF, the coordinates of points A and G, and the nature of the relationship mentioned in part c.
However, here’s a general guide to what you might be looking for:
a. Triangles ABC and DEF are called congruent or similar, depending on their properties.
b. The slope of the line AG can be written as (y2 - y1) / (x2 - x1), where (x1, y1) are the coordinates of point A and (x2, y2) are the coordinates of point G.
c. This is a linear or proportional relationship, but the specific term would depend on the data illustrated in the graph.
If you could provide more details or context about the graph, I'd be able to give you a more precise answer!