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by joining the potnts, plotted, The smooth free hand urve Abos drawon ia, graph., on, a, trend line, d) drawwn through, the scatter of the plotted points in onder, kanoon, as, to fit the data best., 1 Fit, a trend line to the Jollowing, data by, graphic mertod!, Yeare :, 1970 1971 72 48 4み75 46 47 78'7イ, Paoduetion: 30, 34, 48, 36, Ho 50 42 70 60, 22, Solution:, 90-, 80, 70, bo, 50, Trend line., 40, 30, 20, 1970, 1971, 1972, 1973, 1974, 1975 1976, 1977 1978 197, 10

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&. The following, are the figureu, of sales of, last, sin years. Determine the trend by, guaphical, mertiod ., 1985, 1986, 1987, 1988 1989 1990, 사。, 사사, 48, 46, 50., soludion!, YA, 49, 48, 47, Trend line., 467, 451, 44-, 43, 42, 40, 1985, 1986, 1987, 1988, 1989, 1990, Average of inst 3 values, 40 +H4+48, %3D, 3, = 132, => HH., is plotted correspondhing to 1986., Avenaye second 3 values, 42+46+50, =138, - H6, = 4b de plotted larres panding o, to 1989., The dotted line be the trend line.