Graphing Lines Using Intercepts

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Graphing Lines Using Intercepts
4.4

• Goal
• Find the intercepts of the graph of a linear
  equation and then use them to make a quick graph
  of the equation.
• Key Words
• x - intercept
• y - intercept
• x - axis
• y - axis

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An x-intercept is the x-coordinate of a point
where a graph crosses the x-axis. A y-intercept
is the y-coordinate of a point where a graph
crosses the y-axis.
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• Find an x-intercept

Find the x-intercept of the graph of the equation
2x 3y 6.
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• Find an x-intercept

Find the x-intercept of the graph of the equation
5x 2y 20.
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• Find a y-intercept

Find the y-intercept of the graph of the equation
2x 3y 6.
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• Find a y-intercept

Find the y-intercept of the graph of the equation
5x 2y 20.
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• Make a Quick Graph

Graph the equation 3x 2y 12.
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• Make a Quick Graph

Graph the equation 2x 5y -10.
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• Choose Appropriate Scales

Graph the equation y 4x 40.
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• Choose Appropriate Scales

Graph the equation y -2x 25.
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Homework pp. 225-227 15-35 all, 55, 56
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