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# Using Scatter Plots Chapter Exam

Choose your answers to the questions and click 'Next' to see the next set of questions. You can skip questions if you would like and come back to them later with the yellow "Go To First Skipped Question" button. When you have completed the practice exam, a green submit button will appear. Click it to see your results. Good luck!

### Page 1

#### Question 1 1. What is the relationship between two sets of variables used to describe or predict information?

#### Question 2 2. What is a straight line that attempts to predict the relationship between two points, also known as a trend line or line of best fit?

#### Question 3 3. What is a graph of ordered pairs showing a relationship between two sets of data?

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Question 4
4.
Use a ruler or a graphing calculator to find the regression line of the following data set:

(2, 3) (4, 6) (5, 1) (2, 4) (1, 3) (6, 3)

#### Question 5 5. What do we call two sets of variables that can change and are compared to find relationships?

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Question 6
6.
Find the regression line equation using the formulas for the following data set:

(1, 3) (2, 4) (3, 5)

#### Question 7 7. Which of the following problems could be studied through the use of regression analysis?

#### Question 8 8. What is the relationship between two sets of variables used to describe or predict information?

#### Question 9 9. What do we call a straight line that attempts to predict the relationship between two points?

#### Question 10 10. What do we call a prediction where a variable (y) is dependent on a second variable (x) based on the regression equation of a given set of data?

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#### Question 11 11. The _____ refers to the consistent change in y for each unit change in x.

#### Question 12 12. A _____ attempts to predict the relationship between two points.

#### Question 13 13. A(n) _____ is a comparison of two values, usually x and y, and the consistent change between those values.

#### Question 14 14. In the equation y = 4x +15, what does 15 represent?

#### Question 15 15. What is the slope intercept formula?

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#### Question 16 16. What is the relationship between two variables or sets of data?

#### Question 17 17. How are independent variables and dependent variables different?

#### Question 18 18. What is a condition or piece of data in an experiment that can be controlled or changed?

#### Question 19 19. What do we call two sets of variables that can change and are compared to find relationships?

#### Question 20 20. What is a graph of ordered pairs showing a relationship between two sets of data?

### Page 5

#### Question 21 21. How does a regression line show the relationship between two points?

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Question 22
22.
For the following equation, identify the slope, the intercept, and interpret the meaning of each for the scenario.

y= 7.5x - 3

James just got a new job. He will make a certain amount of money per hour, but he will also receive a one-time deduction to pay for his new uniform.

#### Question 23 23. What is the comparison of two values, usually x and y, and the consistent change between those values?

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Question 24
24.
For the following equation, identify the slope, the intercept, and interpret the meaning of each for the scenario.

y = -4x + 7

For every incorrect answer, Stacia loses points. She gets points for writing her name on her paper.

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Question 25
25.
For the following equation, identify the slope, the intercept, and interpret the meaning of each for the scenario.

y= 3x + 25

Jay just got his water bill. He has to pay an initial fee for the service, plus an amount per gallon that he uses.

#### Using Scatter Plots Chapter Exam Instructions

Choose your answers to the questions and click 'Next' to see the next set of questions. You can skip questions if you would like and come back to them later with the yellow "Go To First Skipped Question" button. When you have completed the practice exam, a green submit button will appear. Click it to see your results. Good luck!