Unit 7 Statistics Review

What type of association does this graph have?

• positive 
• negative
• none
• all of the above

Which of the following could be a possible line of best fit for the data?

• y = -5/2x + 20
• y = -x + 19
• y = x + 20
• y = 2/3x + 15 

The equation of the trend line is
y= 1/2x +1
How many laps can a bicycle make around the park in 23 minutes?

• 44 laps
• 12 1/2 laps
• 23 laps
• 14 laps

What is the equation of the line of best fit?

• y = 1/2x + 3
• y = 1/40x 
• y = 1/2x + 15
•  y = 1/40x + 15

Is this line an accurate line of best fit for the data?

• Yes
• No

The graph shows a line of best fit for data collected on the distance bicyclists have remaining in relation to the amount of time they have been riding. What is the equation of the line of best fit?

• y = -25x + 170
• y = 25x + 170
• y = -5/8x + 170
• y = 5/8x + 170

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

Each dot represents 1 day. How many days were recorded?

• 9

• 21

• 20

• 105

How many students had more than 6 candy bars?

• 5
• 2
• 3
• 1

How many students received a score of 94%? 

• 94
• 4
• 1
• 2