Multiple Choice

1. For the data in the table, does *y *vary directly with *x*? If it does, write an equation for the direct variation.

*x y*

8 13

16 26

24 39

*(1 point)*

2. For the data in the table, does *y *vary directly with *x*? If it does, write an equation for the direct variation.

*x y*

40 32

28 16

16 12

*(1 point)*

3. Match the equation with its graph.

– *x *– *y *=

*(1 point)*

4. Match the equation with its graph.

–0.4*x *– 0.8*y *= 0.10

*(1 point)*

5. The table shows the number of miles driven over time.

Time (hours) Distance (miles)

4 184

6 276

8 368

10 460

Express the relationship between distance and time in simplified form as a unit rate. Determine which

statement correctly interprets this relationship.

*(1 point)*

6. Find the slope of the line. *(1 point)*

7. What is the slope of the line that passes through the pair of points (1, 7) and (10, 1)? *(1 point)*

8. What is the slope of the line that passes through the pair of points (– , –3) and (–5, )?

9. What is the slope of the line? *(1 point)*

10. Write an equation in point-slope form for the line through the given point with the given slope.

(8, 3); *m *= 5

*(1 point)*

11. Write an equation in point-slope form for the line through the given point with the given slope.

(–10, –6); *m *=

*(1 point)*

12. The table shows the height of a plant as it grows. Which equation in point-slope form gives the plant’s

height at any time?

Time (months) Plant Height (cm)

3 21

5 35

7 49

9 63

*(1 point)*

13. What is the graph of the equation?

x = –3

*(1 point)*

14.

Write *y *= – *x *+ 7 in standard form using integers.

*(1 point)*

15. Write an equation for the line that is parallel to the given line and passes through the given point.

*y *= 5*x *+ 10; (2, 14)

*(1 point)*

16. Tell whether the lines for each pair of equations are parallel, perpendicular, or neither.

*y *= –3*x *+ 7

–2*x *+ 6*y *= 3

*(1 point)*

17. Tell whether the lines for each pair of equations are parallel, perpendicular, or neither.

*y *= ( )*x *+ 8

–2*x *+ 8*y *= 4

*(1 point)*

18. Write the equation of a line that is perpendicular to the given line and that passes through the given

point.

*y *– 2 = (*x *+ 5); (–4, 9)

*(1 point)*

19.

Below are the functions of *y *= |*x*| and *y *= |*x*| – 5. How are the functions related? *(1 point)*

20. Describe how the graphs of *y *= |*x*| and *y *= |*x *+ 5| are related. *(1 point)*

21. Graph *y = |x| *– 2. *(1 point)*

22. Graph *y *= |*x *– 4|. *(1 point)*

23. Which type of correlation is suggested by the scatter plot? *(1 point)*

Short Answer

24. You use a line of best fit for a set of data to make a prediction about an unknown value. The correlation

coefficient for your data set is –0.015. How confident can you be that your predicted value will be

reasonably close to the actual value?

*(2 points)*

* *

25. A college football coach wants to know if there is a correlation between his players’ leg strength and the

time it takes for them to sprint 40 yards. He sets up the following test and records the data:

Every day for a week, he counts how many times each player can leg press 350 pounds. The following

week, he has each player sprint 40 yards every day. The table shows the average number of leg-press

repetitions and the average 40-yard dash time (in seconds) for seven randomly selected players. What is

the equation of the line of best fit? How many seconds should he expect a player to take to run 40 yards

if that player can do 22 leg-press repetitions? Round any values to the nearest tenth, if necessary.

Leg Press (reps) 15 18 8 30 26 12 21

40-yard Dash (s) 5.2 6.3 6.8 8.2 8.0 5.3 5.9

*(3 points)*

Why Work with Us

Top Quality and Well-Researched Papers

We always make sure that writers follow all your instructions precisely. You can choose your academic level: high school, college/university or professional, and we will assign a writer who has a respective degree.

Professional and Experienced Academic Writers

We have a team of professional writers with experience in academic and business writing. Many are native speakers and able to perform any task for which you need help.

Free Unlimited Revisions

If you think we missed something, send your order for a free revision. You have 10 days to submit the order for review after you have received the final document. You can do this yourself after logging into your personal account or by contacting our support.

Prompt Delivery and 100% Money-Back-Guarantee

All papers are always delivered on time. In case we need more time to master your paper, we may contact you regarding the deadline extension. In case you cannot provide us with more time, a 100% refund is guaranteed.

Original & Confidential

We use several writing tools checks to ensure that all documents you receive are free from plagiarism. Our editors carefully review all quotations in the text. We also promise maximum confidentiality in all of our services.

24/7 Customer Support

Our support agents are available 24 hours a day 7 days a week and committed to providing you with the best customer experience. Get in touch whenever you need any assistance.

Try it now!

How it works?

Follow these simple steps to get your paper done

Place your order

Fill in the order form and provide all details of your assignment.

Proceed with the payment

Choose the payment system that suits you most.

Receive the final file

Once your paper is ready, we will email it to you.

Our Services

No need to work on your paper at night. Sleep tight, we will cover your back. We offer all kinds of writing services.

Essays

No matter what kind of academic paper you need and how urgent you need it, you are welcome to choose your academic level and the type of your paper at an affordable price. We take care of all your paper needs and give a 24/7 customer care support system.

Admissions

Admission Essays & Business Writing Help

An admission essay is an essay or other written statement by a candidate, often a potential student enrolling in a college, university, or graduate school. You can be rest assurred that through our service we will write the best admission essay for you.

Reviews

Editing Support

Our academic writers and editors make the necessary changes to your paper so that it is polished. We also format your document by correctly quoting the sources and creating reference lists in the formats APA, Harvard, MLA, Chicago / Turabian.

Reviews

Revision Support

If you think your paper could be improved, you can request a review. In this case, your paper will be checked by the writer or assigned to an editor. You can use this option as many times as you see fit. This is free because we want you to be completely satisfied with the service offered.