Review Scatter, two-way, and matrices

How many females were surveyed?

• 10
• 16
• 26
• 14

What is the equation of the line of best fit?

• y = 3/2x

• y = 30x

• y = 30x + 300

• y = 3/2x + 300

How many females were surveyed?

• 16

• 10

• 2

• 8

The scatter plot below shows the number of books read by students in Mrs. Hall’s English class and their final grades. Which statement represents the best description about the line of best fit?

• The more books students read, the lower their English grade.
• The more books students read, the higher their English grade.
• The fewer books students read, the higher their English grade. 
• No relationship exists between the number of books students read and their English grades. 

The scatter plot shows the relationship between the number of chapters and the total number of pages for several books.  Use the trend line to predict how many chapters would be in a book with 180 pages. 

• 12 chapters
• 15 chapters
• 18 chapters
• 21 chapters

How many males prefer a skating party?

• 3

• 6

• 14

• 10

What number belongs where the heart is?

• 20

• 18

• 22

• 15

What percentage of males drive sports cars?

• 35%
• 16.25%
• 65%
• 25%

The scatter plot shows the number of absences in a week for classes of different sizes.  Trevor concluded that there is a positive correlation.  Which statement best describes why Trevor's conclusion was incorrect.

• The largest class does not have the most absences.
• The smallest class does not have the least number of absences.
• The data show no relationship between class size and number of absences.
• The data show a negative relationship between class size and number of absences.

Which of the following lines represents the line of best fit for the scatter plot?

• A
• B
• C
• D