Decide whether the relation is a function.{(-3, 6), (-1, -6), (2, 9), (2, 4)}
A. not a function
B. function
Answer: A
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Determine if the statement is a proportion.I. 
II. 
A. I is a proportion, II is not a proportion. B. I is not a proportion, II is a proportion. C. I and II are both proportions. D. Neither I nor II are proportions.
If a problem begins with “There are 200 people at a dance . . .”, an approach to solving the problem may be
(a) Draw a Picture. (b) Guess and Test. (c) Solve a Simpler Problem. (d) Deductive reasoning. (e) None of these is a good approach.
Solve the problem.Let A = 
and b = 
.Determine if the equation Ax = b is consistent for all possible b1, b2, b3. If the equation is not consistent for all possible b1, b2, b3, give a description of the set of all b for which the equation is consistent (i.e., a condition which must be satisfied by 
A. Equation is consistent for all possible b1, b2, b3. B. Equation is consistent for all b1, b2, b3 satisfying -3b1 + b3 = 0. C. Equation is consistent for all b1, b2, b3 satisfying 2b1 + b2 = 0. D. Equation is consistent for all b1, b2, b3 satisfying 7b1 + 5b2 + b3 = 0.
Write the word phrase in symbols, using x as the variable.10 fewer than seven times a number
A. 
B. 7(x - 10)
C. 7x - 10
D. 10 - 7x