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Coordinate System Today’s lesson Do Now: Slide show Guided practice with ordered pairs Coordinate System Graphing and Ordering Pairs Coordinate Plane Y - Axis Quadrant 2 Quadrant 1 X - Axis Quadrant 3 Quadrant 4 Origin (0,0) Terms Ordered pairs a list of two numbers that describes the location of a point on a coordinate plane. (0,2) X-Coordinate shows the position left and right (horizontal) of the coordinate plane. It is the first number in the ordered pair. Y-Coordinate What axis would this point be located on? shows the position up and down (vertical) of the coordinate plane. It is the second number in the ordered pair. Coordinate pairs are always written in the format (X value,Y value) Graphing Skills Set of ordered pairs (-3,2), (3,4), (0,0), (-5,-6) Steps for graphing 1st graph the xcoordinate Right or left 2nd graph the ycoordinate Up or down 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 12 11 10 9 8 7 6 5 4 3 2 1 1 2 3 4 5 6 7 8 9 10 11 12 0 3rd Graph the point with a dot 4th label the points B (A) C D 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 Y - AXIS X - AXIS Sum It Up Previous Knowledge Terminology Y - Axis X-axis- the horizontal axis Y-axis- the vericle axis Origin- the intersection or the X and Y axes Quadrants Ordered Pairs – the x and y coordinates that X - Axis locate a point. Quadrant 2 Quadrant 1 Quadrant 3 Quadrant 4 Graphing Skills (-3,2), (0,0) (3,4) Origin Graphing in Science 7 The line graphs produced by students in science 7 are plotted completely in quadrant 1. This is because we work with both positive X values and positive Y values. Graphing skills Coordinate Pairs Practice Now you try: on the numbered coordinate grid supplied plot the following 10 points 1(8,9) 2(7,7) 3(5,7) 4(7,6) 5(6,4) 6(8,5) 7(10,4) 8(9,6) 9(11,7) 10(9,7) When you have plotted the point join them together in the order you plotted them 1-10 and finally join point 10 to point 1. Graphing skills Coordinate Pairs Practice My product will contain: Ordered pairs written in the correct format. A graph with: - a Title - axes labeled including units A written response which uses the numbers (quantitative observations) to support your answer. What Did I Learn Today? What did we learn about ordered pairs? How do we plot them? Why do we make a graph? What type of observation did we learn to pull out of the text to plot?