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Exam Review Solutions
Chapter 3:
Chapter 4:
Chapter 5:
1. B
2. C
3. a) i) Function; the elements in the first column are all different.
ii) Domain: {1, 3, 5, 7, …}; that is, all positive odd numbers; range: {3, 6,
9, 12, …};that is, all positive multiples of 3
Representations may vary. For example, as a set of ordered pairs:
{(1, 3), (3, 6), (5, 9), (7, 12)}
Linear function; a constant change of 2 in a results in a constant change of 3 in b.
iii) Dependent variable: b; independent variable: a; rate of change:
b) i) Function; the graph passes the vertical line test.
ii) Domain: –3 ≤ x ≤ 9, Range: 1 ≤ y ≤ 5
Representations may vary. For example,
A straight line through the points in this table of values:
Linear function; the points lie on a straight line
iii) Dependent variable: y; independent variable: x; rate of change- 
c) i) Not a function; some ordered pairs have the same first element.
4. a) A negative profit indicates a loss. When 5 T-shirts have been sold, a profit is made.
b) I did not connect the points because it makes no sense to sell a fraction of a
c) Domain: {0, 1, 2, 3, 4, 5, 6, …}, all whole numbers;
Range: {–20, –15, –10, –5, 0, 5, 10, …}, all multiples of 5 greater than or
equal to –20
The graph could be extended to the right as more T-shirts are sold. The graph
cannot be extended to the left because the number of T-shirts sold cannot be
negative. The domain is restricted to whole numbers. The range is restricted to
multiples of 5, greater than or equal to –20.
d) $5/shirt; the profit made on the sale of each T-shirt
e) i) $300
ii) 69
Chapter 6:
Chapter 7: