6. review the scene coordinates, plane caused two lines intersecting and intersecting each other at point zero.7. the teacher writes on the Board the plane scene coordinates, students observe and answer the questions of the teacher.8. divide students into four groups, each group to send the agent shows the coordinates on a planar scene coordinates on the Board all stakeholders simultaneously.9. the Group observed that each graph has that look different from the other groups, and the graph has correlations with all coordinates?
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