Where the emphasis should be on the change in amounts rather than on the movement of the series.

3. To emphosize the difference between values or amounts on different dotes.

4. When the movement of the doto is extremely violent or irregular.

5. When the presentation is designed for popular appeal.

CURVE CHARTS

B«i*d Upon Av*««4« U S. ftic»% •« R»porf sd by tht U. S. Butmu of Ubor Statitttct

Chicneo Trihunr. The l')J8 Chnrt Book. " Fclnunry 22. 1Q38.

A. The Cost of +he "Market Basket" in the United States Calculated From Government Prices From 1929 Through 1937.

It is not possible to compare the curve in this chart with the chart B below since the content of the "market basket" as listed is not the same.

7jOO

B«f*d Upon Avvraq* U. S. Pricat »t R*pert*d by th* U. S. Bureau of Labor Statittici OOOAXS

7JM

JFMAMJ JASOND JFMAMJ J A J F MAM J J AS ON 0 J FMAM J J A SON D JFMAM J J A 1914 1915 1916 1917 1918

L«tt«r« Abova Ara kwKal* of MeirHu: J for January, F for Fabmary, Etc

Chicago Tribune. "The 1938 Chart Book." February 22, 1938. B. The Cost of the "Market Basket" in the United States During the World War.

1. When the zero line is omitted, this is one method of indicating its absence. It might

have been better if the line had been more wavy so that in reduction the irregularity would not be lost.