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AMC8每日一题(2000年真题#04)

2018-03-30
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2000 AMC 8 竞赛试题/第4题

Problem

In 1960 only 5% of the working adults in Carlin City worked at home. By 1970 the "at-home" work force had increased to 8%. In 1980 there were approximately 15% working at home, and in 1990 there were 30%. The graph that best illustrates this is:

[asy] unitsize(18); draw((0,4)--(0,0)--(7,0)); draw((0,1)--(.2,1)); draw((0,2)--(.2,2)); draw((0,3)--(.2,3)); draw((2,0)--(2,.2)); draw((4,0)--(4,.2)); draw((6,0)--(6,.2)); for (int a = 1; a < 4; ++a) { for (int b = 1; b < 4; ++b) { draw((2*a,b-.1)--(2*a,b+.1)); draw((2*a-.1,b)--(2*a+.1,b)); } } label(

Solution

The data are1960(5%),1970(8%),1980(15%)and1990(30%)Only one of these graphs has the answer and that is choice(E)

Solution 2

We can look at the graphs and note that the only one that has all the correct points is(E)

上一篇： AMC8每日一题（2000年真题#01）
下一篇： AMC8每日一题(2000年真题#05)

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