Chapter 3 Section 2

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Chapter 3 Section 2

• Graphing Equations

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Note!

• All graphs must be done on graph paper using a
  straight edge. Sloppy work will not be graded.
• Free Graph Paper! Well almost

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Solutions to Equations in 2 Variables

• Unless otherwise stated, the first number in an
  ordered pair replaces the variable that occurs
  first alphabetically.
• Determine if any of the given ordered pairs are
  solutions to 4x 3y 22(7, 2), (2, 10),
  (1, 6)

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Graph an Equation

• The graph of an equation is the set of all
  possible solutions to the equation.
• If a point is on the graph, it is a solution to
  the equation.
• If a point is a solution to the equation, then it
  is on the graph.

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• Lets do it Graph y 3x 2

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• Graph y 2x 3 using the TABLE

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• Graph y 2x 3 using the GRAPH on the
  calculator, set the window to 5, 5, 10, 10

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• Graph 4x 2y 12

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• Graph x 5y 10 by first solving for y.

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• Graphing a nonlinear using the calculator.

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Cost of College

• The cost T, in hundreds of dollars, of tuition
  and fees at a community college in Vermont is
  given by T (6/5)c 1, where c is the number of
  credits (units) registered in by a student. Graph
  the equation and use it to estimate the cost of a
  4 credit course. Check your answer using the
  equation.