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Mathematics 8 Online
OpenStudy (anonymous):

according to a census, there were 66 people per mile (this is called the population density) in a certain country in 1980. By 2000 the number of people per square was 78. use this information to develop a liner equation in slope-interception form. In developing the equation, think of 1980 as zero. let x be the time of years and y be the population density.

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