Bivariate Data

• Positive correlation/trend
• Negative correlation/trend
• No correlation/trend

What does the x variable represent?

• The number of laps

• The amount of time in hours

• The amount of time in minutes

• How long it takes to go 0 laps

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 220 pages.

• 22 chapters

• 20 chapters

• 18 chapters

• 26 chapters

What would be the correlation be between study time and test grades?

• positive correlation

• negative correlation

• no correlation

• cannot be determined

About how many male math teachers were there in 2006?

• 15

• 30

• 35

• 45

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

The graph shows a line of best fit for data collected on the amount of income earned by lawn companies in relation to the number of yards mowed.  What is the equation of the line of best fit?

• y = (3/2) x

• y = 30x

• y = 30x + 300

• y = (3/2)x + 300

In a scatterplot, an outlier...

• ...is something we didn't learn in 8th grade

• ...is a point on the origin

• ...is a point that is far outside the main cluster of points/ordered pairs

• ...is a group of points that are close together

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. 

A line drawn on a scatter plot that is close to most of the data points.

• Best fitting line

• Best Linear Line

• Line of best fit