A line graph represents how a quantity changes across an ordered sequence, often time, with horizontal and vertical axes, labeled units, and a scale that may increase by values greater than one. Interpretation includes reading plotted values, comparing quantities, identifying increases, decreases, and unchanged intervals, and finding differences to answer questions; connected segments show the pattern between recorded points, not necessarily exact values at unmeasured times. Continuous functions, interpolation, and statistical trend analysis are not included.
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