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XY Encounter

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Teacher's Guide: Part 1: Pause Point 2

Watch Video Clips @ XY Encounter Streaming Video Page

Map of Teacher's Guide	Part 1	Part 2	Part 3	Part 4
	Introduction	Introduction	Introduction	Introduction
	Pause Point 1	Pause Point 1	Pause Point 1	Pause Point 1
	Pause Point 2	Conclusion	Pause Point 2	Conclusion
	Pause Point 3		Conclusion
	Conclusion

Key Phrase: Keisha says: “X equals 4 and y equals 8.”

[Stop the video before she reveals the rule.]

Involve students by having them explore how to complete Keisha’s table, examine patterns, and describe what they notice. Encourage students to state the rule in words and/or symbols. Have them name other values that fit their rule and could go in the table. Thus you’re helping students apply their rule to make predictions: Do you see a pattern appearing here? Describe a rule. [As x increases by 1, the y-value decreases by 2.]

What types of discussions might evolve from these questions?

• Complete Keisha’s table. Can you identify any patterns in Keisha’s table? What other values would be in the table if it continued? [As x increases by 1, y decreases by 2.]
• Have the students complete Max’s table.
• Look for patterns in Max’s table. Can you state a rule? [As x increases by 1, the y-value increases by 1.]
• Are there any values shared by the two tables? What should happen to the graphs if both tables share a pair of coordinates? [If there is the identical ordered pair in Table 1 and Table 2, this value will satisfy both conditions, and when plotted will be the same point on the grid.]
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