Question 1

Which is the correct graph of the partial function:

Accepted Answer

https://uploads.quizalize.com/224737db-946f-401d-b6e8-724743499f68/question/54b220483392611a9534454de08b1dfc3e853107.png

Answer

https://uploads.quizalize.com/224737db-946f-401d-b6e8-724743499f68/question/dda5b3e266b8635b9e14be8fe633b7d25652e447.png

Answer

https://uploads.quizalize.com/224737db-946f-401d-b6e8-724743499f68/question/80378c1e795b13ee2d079776281f2f42c0c46831.png

Answer

https://uploads.quizalize.com/224737db-946f-401d-b6e8-724743499f68/question/f24ef173f395ba0a1347b02a5d7e31bd1911bd01.png

Question 2

Which of the following set of piece-wise functions matches the graph shown?

Accepted Answer

https://uploads.quizalize.com/224737db-946f-401d-b6e8-724743499f68/question/f738cdbe578da7530ae662518b7d458ae13e6655.png

Answer

https://uploads.quizalize.com/224737db-946f-401d-b6e8-724743499f68/question/ee1929cf4124728b2ac7581fb31130b188f7a7db.png

Answer

https://uploads.quizalize.com/224737db-946f-401d-b6e8-724743499f68/question/1ac5c0ba759732f907dcdeaae2b2b3ca0bb0bd48.png

Answer

https://uploads.quizalize.com/224737db-946f-401d-b6e8-724743499f68/question/823264759f6686b159e739372b98f6f66d5ca21a.png

Question 3

Consider the Piece-wise graph described by the following equation:

Accepted Answer

(3,5)

Answer

(3,13)

Answer

(3,15)

Answer

(3,1)

Question 4

A drug company testing a pain medication wants to know the impact of different dosages on patients' pain levels. They recruited volunteers experiencing pain to try one of 6 different dosages and then rate their pain levels on a scale of 1 to 10. Here are the results:                                                                                                                                                                                 
      All of the scatter plots below display the data correctly, but which one of them displays the data best?
By convention, a good scatter plot uses a reasonable scale on both axes and puts the explanatory variable on the x-axis.

Accepted Answer

https://uploads.quizalize.com/224737db-946f-401d-b6e8-724743499f68/question/c2471540d5287fbef114a376bdfa3a5c79fd3b2c.png

Answer

https://uploads.quizalize.com/224737db-946f-401d-b6e8-724743499f68/question/6f3429913424a878bed77ff4ffb37c992621a766.png

Answer

https://uploads.quizalize.com/224737db-946f-401d-b6e8-724743499f68/question/958da95c75b6ffcff60dae2fc8dc31c35871be45.png

Answer

https://uploads.quizalize.com/224737db-946f-401d-b6e8-724743499f68/question/6aeac3e6b093231cc0125223ffdc0c89ca8b5110.png

Question 5

The graph below shows the relationship between population density (in people per square kilometer) and average rent for 1- bedroom apartments in different cities.
Which statement is the best description of the association between these variables?

Accepted Answer

Cities with higher population densities tended to have higher rents.

Answer

Cities with higher population densities tended to have lower rents.

Answer

There is no clear relationship between population density and rent.

Question 6

Tell whether the system has no solution, one solution, or infinitely many solutions.

Accepted Answer

one solution

Answer

no solutions

Answer

infinitely many solutions

Question 7

Rani went around the laboratory where she works and measured her coworkers' ear circumference (in millimeters). Then she matched her results with each coworkers' age and created the following scatterplot and regression line.
The fitted line has a slope of 0.48.

What is the best interpretation of this slope?

Accepted Answer

On average, each 1 year increase in age was associated with a 0.48 millimeter increase in ear circumference.

Answer

On average, each 1 millimeter increase in ear circumference was associated with a 0.48 year increase in age.

Answer

We would predict a person who is 0 years old to have an ear circumference of 90 mm.

Answer

We would predict a person who is 0 years old to have an ear circumference of 0.48 mm.

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