
Directions: Read carefully.
1. 
A scatter plot is shown in the coordinate plane.
Which of the following graphs most closely approximates a line of best fit for the data in this scatter plot? 



2. 
Students in grades 7 and 8 were randomly surveyed to determine if they preferred "snowboarding" or "skateboarding".
"Boarding" Preference
Students
MathBits 
snowboarding 
skateboarding 
Total 
Grade 7 
130 
110 
240 
Grade 8 
140 
120 
260 
Total 
270 
230 
500 


Which statement is true regarding the data in this survey?
Choose:


3. 
A scatter plot of data is shown at the right. Which correlation (association) best describes the data?
Choose:




4. 
The table below shows the relationship between total fat grams and the total calories in a selection of fast food sandwiches. This data can be modeled by the line y = 13x + 143, where x is the total fat in grams and y is the total calories.


Based upon the model equation, what is the best prediction of the total calories for a sandwich with 36 total grams of fat?
Choose:


5. 
Allison collected data to see if there was a relationship between students having blue eyes and the students wearing yellow on the day of the survey. She randomly surveyed 62 students and obtained the following data:
•
12 students had blue eyes
• 50 students did not have blue eyes
• 40 students were wearing yellow
• 22 students were not wearing yellow
Survey 
Wearing Yellow 
Not Wearing Yellow 

A 
B 

C 
D MathBits 
Which of the following values for A, B, C and D (in that order) could be used to complete the table above regarding Allison's data? 

Choose:


6. 
Students in grades 7 and 8 were randomly surveyed to determine if they received "8 hours or more" or "less than 8 hours" of sleep.
Hours of Sleep
Students 
8 hours or more 
less than 8 hours 
Grade 7 
58 
73 
Grade 8 
48 
82 MathBits 
Based on the results of this survey, which of the following statements are true?
(Check all that apply, and hit SUBMIT!)




7. 
The number of hours spent babysitting and the amount of money earned is plotted at the right. The line of best fit has the equation y = 1.2x + 2.
Which of the following statements can be considered a valid prediction based upon this data?



Choose:


8. 
The table shows the number of grams of carbohydrates, x, and the number of calories, y, of six different foods. The line of best fit is
y = 14.1x + 5.8.
Using the equation, estimate the number of carbohydrates in a food containing 154 calories.
Choose:



9. 
A survey was conducted of 150 randomly selected students asking:
"Which social media do you check first at the end of a school day?".
The results are shown below:
Twitter 
Facebook 
YouTube 
Instagram 
40 
48 
32 
30 MathBits 
The results of this survey are used to make a generalization regarding all of the 650 students in the school building. Based upon this survey, what would be the number of students in the building who first check Facebook at the end of the school day?
Choose:


10. 
Data is randomly collected from students regarding the number of hours they slept the night before a big test, and their scores on the test.
The scatter plot displays the data.
The line of best fit has the equation y = 3.2x + 64.4.
Which of the following statements best describes what the slope and yintercept of the equation represent?



Choose:


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