Determine whether the relation represents a function. If it is a function, state the domain and range.
A. function
domain: {Ms. Lee, Mr. Bar}
range: {Bob, Ann, Dave}
B. function
domain: {Bob, Ann, Dave}
range: {Ms. Lee, Mr. Bar}
C. not a function
Answer: B
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Find parametric equations for the line described below.The line through the point P(3, 4, -5) parallel to the vector 
A. x = -4t - 3, y = 3t - 4, z = -5t + 5 B. x = -4t+ 3, y = -3t + 4, z = 5t - 5 C. x = 4t - 3, y = -3t - 4, z = -5t + 5 D. x = 4t + 3, y = -3t + 4, z = -5t - 5
Evaluate the limit by direct evaluation. Change the form of the function where necessary. 
x2 - 4x - 6
A. Does not exist B. 18 C. -10 D. 2
Perform the indicated operation and, if possible, simplify.
? 
A. 
B. 
C. 
D. 
Solve the problem.The inequality |T - 9| ? 17 describes the range of monthly average temperatures T in degrees Fahrenheit at a City X. (i) Solve the inequality. (ii) If the high and low monthly average temperatures satisfy equality, interpret the inequality.
A. 26 ? T ? 43; The monthly averages are always within 
B. -16 ? T ? 34; The monthly averages are always within 
C. -8 ? T ? 26; The monthly averages are always within 
D. 34 ? T ? 59; The monthly averages are always within 