Correlation and linear regression

Is this a positive, negative, or no relationship?

• positive relationship

• negative relationship

• no relationship

Is this a positive, negative, or no relationship?

• positive relationship

• negative relationship

• no relationship

Is this a positive, negative, or no relatioship?

• Positive relationship

• Negative relationship

• No relationship

Is r = -0.87 strong, moderate, or weak?

• strong

• moderate

• weak

If x is temperature and y is coffee sales, use the following formula to determine the coffee sales on a 34° day.

y = -60x+6443

• $4584

• $4673

• $8303

• 6443

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

Which with is the line of best fit?

• A) Black

• B) Orange

• C) Red

• D) Blue

What type of correlation does this graph show?

• A) Positive

• B) negative

• C) none

• D) all of the above

As x increases, y increases

• A) correlation coefficient

• B) causation

• C) positive correlation

• D) negative correlation

What would the correlation be between math grades and the time it takes to run a mile ?

• Postive Correlation
• Negative Correlation
• No Correlation
• Cannot Be Determined