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1. |
In a science experiment, students hung a cup from a spring and measured the length of the spring when candies were added to it. Their data are shown in the table below. Which statement is true? |
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A. |
The relation is a function because for each x value, there is exactly one y value. |
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B. |
The relation is not a function because there are two y values for some x values. |
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C. |
The relation is a function because the range values increase. |
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D. |
The relation is not a function because only a line can be a function. |
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Hint |
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2. |
Find the y-intercept of the graph of 2x - 5y = 10. |
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A. |
5 |
B. |
2 |
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C. |
0 |
D. |
-2 |
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Hint |
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3. |
The temperature f(x) of water in a lake in degrees Fahrenheit is estimated by the function shown below, where x is the depth in feet of the water. What would be the temperature of water 30 feet below the surface? |
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A. |
111°F |
B. |
63°F |
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C. |
33°F |
D. |
71.25°F |
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Hint |
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4. |
Find the slope-intercept form of an equation of the line that has a slope of  and passes through (8,2). |
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A. |
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B. |
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C. |
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D. |
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Hint |
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5. |
A best-fit line drawn on a scatter plot ________ |
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A. |
is a line that goes through every data point. |
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B. |
must be drawn through the first and last data points. |
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C. |
always has a positive slope. |
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D. |
approximates the linear relationship of data points. |
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Hint |
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6. |
Choose the graph of f(x) = |x| - 2. |
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A. |
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B. |
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C. |
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D. |
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Hint |
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7. |
Which equation describes graph A? |
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A. |
y = | 2.25x | |
B. |
y = | x - 1 | |
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C. |
y = 2.25| x | - 1 |
D. |
y = 2.25x - 1 |
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Hint |
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8. |
Choose the line whose slope is undefined. |
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A. |
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B. |
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C. |
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D. |
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Hint |
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9. |
When the equation  is written in standard form, what is the value of B? |
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A. |
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B. |
-25 |
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C. |
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D. |
25 |
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Hint |
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10. |
Choose the line that has a slope of zero. |
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A. |
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B. |
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C. |
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D. |
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Hint |
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11. |
Write the equation of the line through (5, -3) and (-2, -8) in slope-intercept form. |
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A. |
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B. |
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C. |
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D. |
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Hint |
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12. |
When finding the equation for a line of fit for a scatter plot, you should use __________. |
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A. |
two points that you think represent the data well |
B. |
the first and last points on the plot, with respect to the horizontal |
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C. |
all of the points on the plot |
D. |
the point most characteristic of the scatter plot |
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Hint |
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13. |
Choose the ordered pair that satisfies 7x – 15y < -13. |
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A. |
(-2, 0) |
B. |
(2, -3) |
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C. |
(0, -2) |
D. |
(1, 1) |
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Hint |
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14. |
What is the inequality represented in the graph? |
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A. |
3x + 2y  0 |
B. |
3x – 2y  0 |
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C. |
3x + 2y 0 |
D. |
3x – 2y 0 |
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Hint |
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