FOCUS PLAN A. 1E

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FOCUS PLAN A. 1E

• Predictions and Conclusions in Functional
  Relationships

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1E The student will interpret and make
decisions, predictions, and critical judgments
from functional relationships.

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• ON your TAKS, you will be asked to interpret and
  make predictions from functional relationships.
• A functional relationship may be a graph or a
  table.
• The following slides are examples of TAKS
  questions.

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Grade 11 TAKS 2003

• Gina did a research project on how age affects
  sleep patterns. She concluded that as people
  age, they sleep fewer hours until a point in
  adulthood when the number of hours remains
  constant. Gina also found that after the age of
  70 the amount of time spent sleeping increases
  slightly. Which graph best shows the results of
  Ginas research?

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Grade 11 TAKS 2004

• Karen jogs at a steady pace up a hill in her
  neighborhood. She then runs down the hill, and
  her speed increases. Which graph best describes
  this situation?

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The graph shows the number of gallons of gas used
by Marias car as a function of the number of
miles driven.

• About how many gallons of gas will Maria need for
  a 170 mile trip?
• A 7 gal
• B 8.5 gal
• C 9.5 gal
• D 11 gal

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Drawing Conclusions from Functional
Relationships

• Understand the problem.
• Identify the quantities involved and any
  relationships between them.
• Determine what the variables in the problem
  represent.
• For graphs Determine what quantity each axis on
  the graph represents.
• For tables Determine what quantity each column
  in the table represents.
• Look for trends in the data. Look for maximum
  and minimum values in graphs.
• Look for any unusual data.
• Match the data to equations or formulas in the
  problem