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Published byVratislav Čech Modified over 5 years ago
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COORDINATE PLANE QUAD II QUAD I QUAD III QUAD IV Y-axis
Parts of a plane X-axis Y-axis Origin Quadrants I-IV QUAD II QUAD I Origin ( 0 , 0 ) X-axis QUAD III QUAD IV
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PLOTTING POINTS Remember when plotting points you always start at the origin. Next you go left (if x-coordinate is negative) or right (if x-coordinate is positive. Then you go up (if y-coordinate is positive) or down (if y-coordinate is negative) B C A D Plot these 4 points A (3, -4), B (5, 6), C (-4, 5) and D (-7, -5)
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X AND Y INTERCEPTS The x-intercept is the x-coordinate of a point where the graph crosses the x-axis. The y-intercept is the y-coordinate of a point where the graph crosses the y-axis. The x-intercept would be 4 and is located at the point (4, 0). The y-intercept is 3 and is located at the point (0, 3).
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GRAPHING LINES BY MAKING A TABLE
I could refer to the table method by input-output table or x-y table. For now I want you to include three values in your table. A negative number, zero, and a positive number. Graph y = x + 2 INPUT (X) OUTPUT (Y) -1 1 By making a table it gives me three points, in this case ____________________
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Plot (-2, -4), (0, 2) and (1, 5) Then draw the line. Make sure your line covers the graph and has arrows on both ends. Be sure to use a ruler. Slope-intercept graphing
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