Solve the problem.The data in the table was obtained for an electrical circuit with constant resistance. The current flowing through the circuit was measured when various amounts of voltage were applied to the circuit. 
Let I = f(V) be the current (in milliamperes) flowing through the circuit when the voltage applied to the circuit is V (in volts). Find an equation of f. Use ratios to find the variation constant.
A. f(V) = 25.04V
B. f(V) = 25.5V
C. f(V) = 
D. f(V) = 
Answer: A
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Solve the system by substitution. If the system is inconsistent or dependent, say so.2x + 3y = -2 2x = -8
A. (-4, -2) B. (-2, 0) C. (-4, 2) D. (2, -4)
Answer the question.How can the graph of f(x) = 0.8|x - 10| + 7.3 be obtained from the graph of y = |x|?
A. Shift it horizontally 10 units to the left. Stretch it vertically by a factor of 8. Shift it vertically 7.3 units upward.
B. Shift it horizontally 8 units to the left. Shrink it vertically by a factor of 0
Shift it vertically 7.3 units upward.
C. Shift it horizontally 7.3 units to the right. Stretch it vertically by a factor of 8. Shift it vertically 10 units downward.
D. Shift it horizontally 10 units to the right. Shrink it vertically by a factor of 0.8. Shift it vertically 7.3 units upward.
Solve the system by the substitution method.x2 + y2 = 25x - y = 1
A. {(4, -3), (3, -4)} B. {(4, 3), (-3, -4)} C. {(-4, -3), (-3, -4)} D. {(-4, 3), (-3, 4)}
Use a commutative property to write an equivalent expression.b + 8
A. b - 8 B. 8b C. b ? 8 D. 8 + b