Interpret Trend Line

Arjun, Avery, and Noah are in a library, surrounded by a sea of books. They notice a scatter plot chart on the wall showing the relationship between the number of chapters and the total number of pages for several books. Arjun, being the curious one, wonders how many chapters would be in a book with 180 pages. Can you help him predict this using the trend line on the chart?

• 12 chapters

• 15 chapters

• 18 chapters

• 21 chapters

Zoe, Avery, and Aria are trying to understand the relationship between two variables in a scatter plot. How can they interpret this relationship?

• They can interpret the relationship by observing the pattern or trend of the plotted points.

• They can interpret the relationship by measuring the distance between the plotted points.

• They can interpret the relationship by looking at the color of the plotted points.

• They can interpret the relationship by connecting the plotted points with straight lines.

What is the main purpose of a line graph?

• so you don't have to read words

• to show trends over time

• to have an independent variable

What is the general trend of this line graph?

• The more you mow, the less money you make.

• You make the same amount of money regardless of how long you mow.

• The more you mow, the more money you make.

Tags

CCSS.HSF.IF.B.4

Which statement is true based on the information in the graph?

• More time was spent on homework on Monday than Tuesday

• No homework was completed on Friday

• The same amount of time was spent on homework each night

How can you determine the trend or pattern in a line graph?

• Analyze the direction, slope, and steepness of the line.

• Look for any sudden changes or outliers in the data.

• Examine the x and y coordinates of the line.

• Calculate the average of the data points on the line.

What type of association does this graph have?

• positive

• negative

• none

• all of the above

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. 

Tags

CCSS.RI.7.7

CCSS.RI.8.7

CCSS.RI.9-10.7

CCSS.RL.8.7

CCSS.RL.9-10.7

Which scatter plot shows a linear relationship between x and y?

• Graph A

• Graph B

• Graph C

• Graph D

Tags

CCSS.8.F.A.3

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