Data Plots

What is a trend line that shows the most accurate relationship between x and y and is is very close to most of the data points?

• linear regression

• no correlation

• trend line

• line of best fit

If a scatterplot has no association 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!)

Looking at the graph, what is the correlation between the x and y variables?

• y increases as x increases

• y is constant

• y decreases as x descreases

• y decreases as x increases

Which scatterplot most likely has a line of best fit represented by y = - 2x + 1

• W

• X

• Y

• Z

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

What is a line of best fit used for?

• To make predictions

• To make the graph look pretty

• To connect the points

• To make it look like you know what you are doing

About how many male math teachers were there in 2006?

• 15

• 30

• 35

• 45

The dot plot shows how many minutes it took

Mrs. Nellie to vacuum.

What is the difference between the number of times she vacuumed 9 or more minutes and the number of times she vacuumed less than 4?

• 4

• 3

• 6

• 1

Which scatterplot best represents all the data in the table?

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• 
• 
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What is the sum of Ryan’s greatest math score and least math score?