Solve the problem.The table lists the average composite scores on a national entrance exam for selected years.
(i) Make a line graph of the data.(ii) If the graph represents a piecewise-linear function f, find a symbolic representation for the piece of f located on the interval 
A. 
f(x) = 0.75x - 1359.5 if 1986 ? x ? 1990
B. 
f(x) = 131.5 if 1986 ? x ? 1988
C. 
f(x) = 4.4x - 8615.7 if 1990 ? x ? 1992
D. 
f(x) = 122.7 if 1990 ? x ? 1992
Answer: B
Mathematics
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