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The Number of Post Offices in the US PowerPoint Presentation
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The Number of Post Offices in the US

The Number of Post Offices in the US

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The Number of Post Offices in the US

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  1. The Number of Post Offices in the US 2000 1800

  2. Number of Post Offices from 1800-2000

  3. Use two different curves to model the number of post offices. Quadratic equation for the left part of the graph:y=9.070146226x^2-32813.34x+29679068.8 Cubic equation for the right part of the graphy= -.067929505x^3+404.2637x^2-802042.10556x+530493106.98

  4. Early Post Office

  5. People waiting outside a post office in New Jersey.

  6. Mail was hand stamped and sorted in the early days.