Question 1194634: The average number of persons per household in the United States has been shrinking steadily for as long as statistics have been kept and is approximately linear wi th respect to time. In 1980 there were about 2.76 persons per household, and in 2012 about 2.55.
If N represents the average number of persons per household and t represents the number of years since 1980, write a linear equation that expresses N in t erms of t
Answer by Boreal(15235)   (Show Source):
You can put this solution on YOUR website! ordered pairs are (0, 2.76) and (32, 2.55)
point slope formula y-y1=m(x-x1) m slope and (x1, y1) a point. Slope is -0.21/32 or -0.0066
y-2.76=-0.0066(x); y is N and x is t, so
N=-0.0066t+2.76
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