ACT CHAPTER 21 SCATTERPLOT

Choose the graph with a trend line that best fits the data. (a)  

• graph 1
• graph 2
• graph 3
• graph 4

Which sentence describes the relationship shown on this scatter plot?

• As the temperature decreases, the visitors increase.

• As the temperature increases, the number of visitors increases.

• As the visitors increase, the temperature decreases.

• No correlation

What represents the x axis?

• ABC Company
• Hours Worked
• Amount Earned in Dollars
• Hours in Car

What represents the y axis?

• ABC Company
• Hours Worked
• Amount Earned in Dollars
• Hours in Car

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 140 pages. 

• 12 chapters
• 19 chapters
• 14 chapters
• 21 chapters

As the age of the car increases, its value decreases. Which scatterplot represents this relationship?

• A
• B
• C
• D

Match each scatter plot to its description.

• Negative Correlation

• 
• Positive Correlation

• 
• No Correlation

• 

What is the slope of this prediction equation?

• 1344

• 19

• -19

• -19x

What is the y-intercept of the prediction equation?

• -149

• 149

• 4.4

• 4.4x

What does the slope mean in the context of the problem?

• The cost will increase by $1.40 per topping
• The cost will decrease by $1.40 per topping
• The cost will increase by $1.90 per topping
• The cost will decrease by $1.90 per topping