33. The correct answer is (D).
(A) Graphs as a circle.
(B) Graphs as vertical and horizontal lines.
(C) |x + y| = 3 consists of 2 lines, x + y = 3 and – x – y = 3.
(E) Graphs as one straight line.
(D) Graphs as x + y = 3, x – y = 3, –x + y = 3, and x + y = 3, which are the four lines in the graph.
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