Question

the table below lists the percent of a countrys population that is foreign-born for selected years.

year	1930	1940	1950	1960	1970	1980	1990	2000	2008
percent	11.5	8.7	6.7	5.5	4.4	6.5	8.4	10.5	12.6

answer parts a through e.
(a) plot the data. let x = 0 correspond to the year 1930, x = 10 correspond to 1940, and so on. choose the correct graph below.
a.
b.
c.
d.
0,80,10 by 0,15,3

Explanation:

First, map the years to x-values: 1930→0, 1940→10, 1950→20, 1960→30, 1970→40, 1980→50, 1990→60, 2000→70, 2008→78. Then list the (x, percent) pairs: (0,11.5), (10,8.7), (20,6.7), (30,5.5), (40,4.4), (50,6.5), (60,8.4), (70,10.5), (78,12.6). The data first decreases to x=40, then increases steadily. Match this trend to the graphs: Graph B shows an initial decrease then a steady increase, which matches the data.

Answer:

B. [Graph showing initial decrease then steady increase]