Chapter 2 Quiz: Linear Models, Equations & Inequalities

10 Questions | By Sajones7668 | Last updated: Mar 20, 2022 | Total Attempts: 72

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Chapter 2 Quiz: Linear Models, Equations & Inequalities - Quiz

This is a quiz. You will be graded on correctness.

Questions and Answers

1.

Solve .
- A.
  
  3/7
- B.
  
  25/7
- C.
  
  -1
- D.
  
  1
2.

Solve
- A.
  
  1/4
- B.
  
  -1/4
- C.
  
  4
- D.
  
  -4
3.

Solve .
- A.
  
  1
- B.
  
  -1
- C.
  
  5/3
- D.
  
  -1/4
4.

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