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 - 1356.5 if 1982 ? x ? 1986
B. 
f(x) = 4.4x - 8598.1 if 1986 ? x ? 1988
C. 
f(x) = 122.7 if 1986 ? x ? 1988
D. 
f(x) = 131.5 if 1982 ? x ? 1984
Answer: D
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Write an algebraic expression for the specified quantity.A car radiator has 50 liters of a mixture that is 40% antifreeze. To strengthen the mixture, pure (100%) antifreeze must be added. Let x = the number of liters of pure antifreeze added to the 50-liter mixture. Write an algebraic expression for (i) the number of liters of mixture there will be once the pure antifreeze is added; (ii) the number of liters of antifreeze in the mixture obtained by adding the pure antifreeze to the original 50-liter mixture.
A. (i) 50 + x (ii) 25 + x B. (i) 50 - x (ii) 20 - x C. (i) 50 - x (ii) 16.7 + x D. (i) 50 + x (ii) 20 + x
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Rewrite the statement so the inequality symbol points in the opposite direction and the new statement has the same meaning as the original.-3 < -1
A. -3 > -1 B. -1 < -3 C. -3 ? -1 D. -1 > -3