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In your test….

September 10, 2012 Leave a comment Go to comments

This list should help you to revise. Look through it carefully and decide how confident you are on each point (2 = Fine, 1 = Some work needed, 0 = No idea). Then concentrate on what you need to.

  • Represent a relation in different ways and convert between each, including:
    • Ordered pairs
    • Mapping diagram
    • Graph
    • Algebraic equation
    • Data table
  • State the domain and range of a relation.
  • Decide if a relation is a function or not.
  • Evaluate f(k) where f and k are given. E.g. If f(x) = 3x – 1, what is f(3)?
  • Solve f(x) = k where f and k are given. E.g. If f(x) = 3x – 1, solve f(x) = 5?
  • Rearrange f(x) to give f-1(x). If f(x) = 3x – 1, what is f-1(x)?
  • Evaluate f-1(k) where f and k are given. E.g. If f(x) = 3x – 1, what is f-1(3)?
  • Solve f-1(x) = k where f and k are given. E.g. If f(x) = 3x – 1, solve f-1(x) = 5?
  • Graph a piecewise function from an equation.
  • Write the equation of a piecewise function from the graph.
  • State the domain and range of a piecewise function.
  • Draw a line of best fit on a scatter plot and find its equation.
  • Input a data table into the TI-84 and use it to find the line of best fit.
  • Explain the meaning of the slope of a linear relation.
  • Discuss whether a relation might or might not be linear.
  • Discuss whether a relation might or might not be a function.
  • Interpret graphical information, including domain and range, in the context of a given problem.
  • ALL GRADE 9 MATERIAL ON LINEAR EQUATIONS AND GRAPHS.
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