101ch1appendix

# 101ch1appendix - Appendix Making Using Graphs 13:00 Why...

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13:00 Appendix: Making & Using Graphs Why bother? Slope

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13:00 13:00 2 Why bother? visual relationship between to variables analyze & understand -- information -- ideas
13:00 13:00 3 “A picture is worth a thousand words” corny, but true a graph conveys info more clearly & quickly than words

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13:00 13:00 4 scatter diagram -- graph x value that corresponds to y value -- relationship between x and y -- do they move in same direction? -- opposite direction? -- varied directions?
13:00 13:00 5 each point = 1 year as income rises, so does consumption

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13:00 13:00 6 time-series graph -- measures the behavior of a variable over time -- x axis = time -- y axis = variable -- Is variable high or low? rising or falling? stable or volatile?
13:00 13:00 7 example: price of coffee price is volatile no long-term trend of rising or falling price ranged between \$1-\$5 per lb.

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8 cross-section graph
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## This note was uploaded on 07/19/2011 for the course ECON 101 taught by Professor Wood during the Spring '07 term at Berkeley.

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101ch1appendix - Appendix Making Using Graphs 13:00 Why...

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