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Graphing

Graphing. WHY GRAPH?. Visualize data Tells a story Make comparisons. Types of Graphs. Pie Chart Division of the whole or parts of the whole, Easy to grasp, Label larger portions in the circle, smaller out side with connecting lines Bar – called histogram

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Graphing

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  1. Graphing

  2. WHY GRAPH? • Visualize data • Tells a story • Make comparisons

  3. Types of Graphs • Pie Chart • Division of the whole or parts of the whole, Easy to grasp, Label larger portions in the circle, smaller out side with connecting lines • Bar – called histogram • Numerical dimensions are shown in bars or varying lengths, shows comparisons, multiple comparisons are possible • Line • Shows comparisons, widely Used, relationship through time

  4. Data Tables Title • Title • Variables • Units Plot on x-axis Plot on y-axis

  5. Layout Y Leave room for labels X

  6. Selecting scales Speed of Car 160 Make sure it will fit on the paper before you number By “fives or “tens” 0 10 By “ones”

  7. Labels Speed of Car • Title • Variables • Units Distance(m) Time (sec)

  8. Plotting Data Points • Where does each set of variables meet on the graph? 5 4 3 2 1 1

  9. Lines and Curves • See board

  10. Reading Graphs Interpolation - reading inside the graph Extrapolation - reading beyond limits of graph

  11. Common Mistakes • Missing labels – title, variables, unit • Graph too small • Uneven scale • Best fit line drawn incorrectly • Interpolations/extrapolations not shown with dotted line

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