Graph Using Intercepts

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Graph Using Intercepts

• GPS MM1A1b
• MM1A1c
• MM1A1d
• MM1A1e

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EQs

• How do we graph and translate basic functions?
• How do certain characteristics of functions
  relate to their graphs?

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Vocabulary

• x-intercept The x-coordinate of a point where a
  graph crosses the x-axis.
• y-intercept The y-coordinate of a point where a
  graph crosses the y-axis.

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Intercepts Rules

• x-int Set y0 and solve for x.
• y-int Set x0 and solve for y.

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Example 1Find the intercepts of a graph of an
equation

• Find the x-intercept and the y-intercept of the
  graph of
• 7x 3y 21.

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Example 2Use a graph to find the intercepts

• Identify the x-intercept and y-intercept of the
  graph

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Example 3Use intercepts to graph an equation

• Graph 3x 2y 6

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Solution
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Guided Practice for Examples 1, 2, 3

• Find the x-intercept and the y-intercept of the
  graph of the equation.
• -4x 3y 24
• 5x y 15
• y 1/5x 3
• Graph x 1/2y 1. Label the points where the
  line crosses the axes.
• Continued

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Examples Continued

• Identify the x-intercept and y-intercept of the
  graph.

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Joke of the Day

• What happened when the boat carrying red paint
  hit the boat carrying blue paint?

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Answer

• They were marooned.