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MS 101: Precalculus
Final Exam
June 29, 2006
Give your best answers to the following questions. Be sure to show your work in order to receive
partial credit. In general, a correct answer without accompanying work will receive no credit. Do
your own work!
On my honor, I have neither given nor received illicit information during this examination.
Signature
Printed Name
1. Find the equation of the line through (?2,4) and (3,15).
2. What is the slope of a line perpendicular to y = 72x ?4?
3. Solve
a. 5[3 + 2(x ?6)] = 3x + 1
b. 4x ?13 ? x5 ?1
4. The table shows the changes in the minimum hourly wage in the United States for selected years.
Year Wage
1978 2.65
1979 2.90
1980 3.10
1981 3.35
1990 3.80
1991 4.25
1996 4.75
1997 5.15
2004 5.50
2005 6.50
a. Find the least squares linear regression model for this data.
b. Predict the minimum wage in 1994.
5. Solve
a. |4x + 3| = 12
b. |2x + 5| ? 7
6. Given
x f(x) g(x)
-2 1 X
0 4 X
1 X 2
2 3 4
3 X -2
4 2 0
a. (g ? f)(?2)
b. (f ? g)(3)...

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