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1. |
The set of all first coordinates, or x-coordinates, from the ordered pairs in a relation is called the_______. |
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A. |
ordered coordinates |
B. |
range |
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C. |
domain |
D. |
related coordinates |
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Hint |
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2. |
The set of all second coordinates, or y-coordinates, of the ordered pairs in a relation is called the______. |
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A. |
related coordinates |
B. |
ordered coordinates |
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C. |
domain |
D. |
range |
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Hint |
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3. |
The set of solutions to an equation in two variables is called the______. |
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A. |
domain set |
B. |
solution set |
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C. |
range set |
D. |
identity |
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Hint |
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4. |
Which equation is a linear equation? |
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A. |
y2 = 9 |
B. |
3x + 3xy + y = 10 |
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C. |
-2x = 5y + 1 |
D. |
xy = 7 |
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Hint |
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5. |
If any vertical line passes through no more than one point of the graph of a relation, then the relation is a(n)_______. |
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A. |
equivalent relation |
B. |
function |
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C. |
straight line |
D. |
domain relation |
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Hint |
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6. |
If f(x) = -5x + 8, find f(-1). |
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A. |
2 |
B. |
3 |
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C. |
13 |
D. |
40 |
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Hint |
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7. |
An equation of the form xy = k, where k 0, is called a(n) _____. |
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A. |
inconsistant variation |
B. |
inverse variation |
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C. |
proportional variation |
D. |
direct variation |
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Hint |
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8. |
Suppose y varies inversely as x, and y = 9 when x = -4. What is the constant of variation? |
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A. |
-36 |
B. |
5 |
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C. |
36 |
D. |
-13 |
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Hint |
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9. |
Suppose a rectangle has a perimeter of 16 cm. What are the possible dimensions of the rectangle given the domain (or length) values {2, 3, 4}? |
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A. |
(2, 10), (3, 11), (4, 12) |
B. |
(2, 12), (3, 10), (4, 8) |
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C. |
(2, 6), (3, 5), (4, 4) |
D. |
(2, 14), (3, 13), (4, 12) |
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Hint |
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10. |
Which is true of the equation y = cx where c is a constant? |
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A. |
The graph passes through the origin. |
B. |
The graph will be decreasing. |
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C. |
The graph will always cross the x-axis at exactly one point. |
D. |
The graph will be increasing. |
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Hint |
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11. |
Suppose y varies directly as x and y = -10 when x = 5. Find x when
y = 40. |
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A. |
-20 |
B. |
20 |
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C. |
-10 |
D. |
10 |
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Hint |
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12. |
If there are 3 feet in 1 yard, how many feet are in 7.8 yards? |
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A. |
2.6 ft |
B. |
23.4 ft |
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C. |
2.2 ft |
D. |
14.9 ft |
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Hint |
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