BetterGrades Precalculus · Unit 6 · Assessment

Unit 6 Investigation

A multistage representation and verification task.

investigation

5 concrete stages

A multistage representation and verification task.

Investigation rubric

  1. represent the situation
  2. perform valid mathematical work
  3. interpret the result
  4. verify with a second representation
Assessment

Complete every required response

Item 101

Explain why this conclusion is valid: x3,2x\ne 3,-2. Use the foundation problem as evidence: Domain of xx2x6\frac{x}{x^2-x-6}.

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Item 202

Explain why this conclusion is valid: Left -∞, right ++∞. Use the foundation problem as evidence: Analyze 1x2\frac{1}{x-2} near 22.

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Item 303

Explain why this conclusion is valid: x+1+2x1,x+1+\frac{2}{x-1}, so asymptote y=x+1y=x+1. Use the foundation problem as evidence: Analyze x2+1x1\frac{x^2+1}{x-1}.

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Item 404

Correct this reasoning and identify the first unsafe assumption: A frequent error is omitting a hole or connecting branches across a vertical asymptote.

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Item 505

Connect two representations for this example: Solve x+3x40\frac{x+3}{x-4}\le 0. Describe what a graph, table, mapping, or algebraic form would have to show.

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