Convert the units using unit fractions.8250 lb = 
tons
A. 8
B. 4
C. 3
D. 5
Answer: B
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Use the graph of the relation to identify the domain and range.y = - 
x
A. domain: (-?, ?)
range: (-?, ?)
B. domain: (-?, ?)
range: 
C. domain: (-?, 0)
range: (-?, ?)
D. domain: 
range: (-?, ?)
Determine the principal value without using a calculator.
2
A. 8 B. Not real number C. -8 or 8 D. -8
Identify the figure as a line, segment, or ray. Then use the correct symbol to name the figure.
A. line; 
B. line segment; 
C. line; 
D. ray; 
Solve the problem.A study was conducted to compare the average time spent in the lab each week versus course grade for computer students. The results are recorded in the table below. The linear model for this data is 
where x is the number of hours spent in the lab and y is grade on the test. Use this model to predict the grade of a student who spends 12 hours in the lab. Number of hours spent in labGrade (percent) 
A. 68.7 B. 66.3 C. 76.6 D. 62.3