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  3. [img]2015m7x/ct_egreqj_egreqtbz1_0110_20151[/img]From 1930 to 1990, approximate

[img]2015m7x/ct_egreqj_egreqtbz1_0110_20151[/img]From 1930 to 1990, approximate

游客2025-02-23  10
问题
From 1930 to 1990, approximately what was the average increase per year in per capita income?
选项 A、$150
B、$200
C、$250
D、$300
E、$350
答案 D
解析 For the 60-year period from 1930 to 1990, the per capita income increased by $24,230 - $6,610, or $17,620. The average annual increase is, which is approximately, or $300.(Since the choices are quite far apart, there is no need for an accurate calculation.)The correct answer is Choice D.
This explanation uses the following strategies.
Strategy 4: Translate from a Figure to an Arithmetic or Algebraic Representation
Strategy 9: Estimate
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