Chapter 2 Quiz: Linear Models, Equations & Inequalities
10 Questions
| Total Attempts: 52
This is a quiz. You will be graded on correctness.
Questions and Answers
- 1.
![Solve . - ProProfs]( "Solve .")
Solve .- A.
3/7
- B.
25/7
- C.
-1
- D.
1
- 2.
![Solve - ProProfs]( "Solve")
Solve- A.
1/4
- B.
-1/4
- C.
4
- D.
-4
- 3.
![Solve . - ProProfs]( "Solve .")
Solve .- A.
1
- B.
-1
- C.
5/3
- D.
-1/4
- 4.
![Solve . - ProProfs]( "Solve .")
Solve .- A.
X > -12
- B.
X < -12
- C.
X > -7
- D.
X < -7
- 5.Using the table on pg 155 #38 in your textbook, find the linear model that is the best fit for the data to 3 decimal places, where x is the number of years after 2000.
- A.
Y = 16283.726x + 271.595
- B.
Y = ax + b
- C.
Y = 271.595x + 16283.726
- D.
Y = 271.595x - 526906.75
- 6.Using your answer from #5, what does the model predict the population will be in 2020?
- A.
21,715 people
- B.
21,716 people
- C.
564,905 people
- D.
564,906 people
- 7.Solve for x and y by graphing: y = 2x + 3 and y = -4x + 12
- A.
X = 1.5, y = 6
- B.
X = -4.5, y = -6
- C.
X = 2, y = 6
- D.
X = 2.5, 2
- 8.Solve for x and y using substitution: 4x - 2y = 10 and y = -3 - 2x
- A.
X = -2.2, y = 1.4
- B.
No solution
- C.
X = 1.4, y = -2.2
- D.
X = 0.5, y = -4
- 9.Solve for x and y using elimination/combination: 3x + 2y = 0 and 2x - y = 7
- A.
X = 1.4, y = 7
- B.
X = 2, y = -3
- C.
X = 1, y = -5
- D.
X = -1, y = 9
- 10.The average salary of clasroom teacher in the United States is given by the function f(t) = 982.06t + 32903.77, where t is the number of years after 1990. In what year was the average teacher salary $40,760.25 according to the model?
- A.
2008
- B.
1998
- C.
8
- D.
40061914.89
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