Ch. 1 Graphing

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4 Terms

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Graph

Visual display of data

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Types of graphs

  • Circle Graphs (pie chart)

    • Show parts of fixed whole

    • Often percentages

  • Bar Graphs

    • How quantity varies across categories

  • Line Graphs

    • Points represent intersections of data

    • Independent (x) and dependent (y)

    • Line of best fit (or curve)

    • Slope is meaningful!

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Interpreting Graphs

  • Slope

    • m=Δy/Δx

  • Linear vs nonlinear

  • Interpolation (continuous data, read “between”)

  • Extrapolation (extend outward, CAREFUL)

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