Lines and Plots

The red line represents the line of best fit for the scatter plot. How many ice cream sales are expected if the temperature is 90°?

• 55

• 0

• 103

• 100

What is a line of best fit used for?

• To make predictions

• To make the graph look pretty

• To connect the points

Tags

CCSS.8.EE.B.5

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

About how many male math teachers were there in 2006?

• 15

• 30

• 35

• 45

Tags

CCSS.HSN.VM.C.6

Estimate the y-intercept of the trend line by looking at the graph.

• 2

• 1.8

• 1.2

• 0

Tags

CCSS.HSF.LE.B.5

Based on this data, how much money would the carpenter earn from a job that took 3 days to complete?

• $740

• $1000

• $550

• $1740

Tags

CCSS.HSF.IF.B.4

What type of association does this scatter plot represent?

• positive linear association

• negative linear association

• no association

• nonlinear association

If a scatterplot has no correlation then...

• ...it has no ordered pairs

• ...it has ordered pairs that have a negative pattern

• ...its ordered pairs have no predictable pattern

• ...if it makes a lion on a graph (roar!)

What is a scatter plot?

• A graph that shows the relationship of two data sets.

• A graph drawn using rectangular bars to show how large each value is.

• A graph that shows information that is connected in some way.

• A graph that shows data changing over time.

What is the type of association (correlation)?

• Negative 

• no association

• positive