Final answer:
The statement illustrates the Transitive Property of Segment Congruence, which is similar to the transitive property of equality. Additionally, all given options A, B, and C are linear equations, which makes option D correct.
Step-by-step explanation:
The statement "If segment AB is congruent to segment CD and segment CD is congruent to segment EF, then segment AB is congruent to segment EF" illustrates the Transitive Property of Segment Congruence. This property states that if one segment is equal to a second segment and that second segment is equal to a third segment, then the first and third segments are also equal. It is analogous to the transitive property of equality in mathematics, which is often used in geometric proofs to establish the congruence of various segments.
As for linear equations, all the options given - A: y = -3x, B: y = 0.2 + 0.74x, and C: y = -9.4 - 2x - are indeed linear. Therefore, the correct choice is D, 'A and B' along with C. Linear equations represent straight lines and have the form y = mx + b, where 'm' is the slope and 'b' is the y-intercept.