The Line of Best Fit

Use Desmos to generate the linear regression model for this data set. What is the residual for the point (31, 560)? (round to nearest hundredth)

• 2.48

• -15.79

• -7.52

• 12.87

Use Desmos to generate the linear regression model for this data set. Use the model to predict the number of calories for an item with 45 grams of fat. Round to the nearest whole number.

• 663

• 722

• 807

• 792

Use Desmos to determine the linear regression model for this data set. What is the equation for the best fit line?

Tags

CCSS.8.EE.C.8C

Use Desmos to determine the linear regression model for this data set. What is the correlation coefficient, r?

• 3.24675

• 59.7403

• 0.9995

• 0.9998

Use Desmos to determine the linear regression model for this data set. What is the residual for the point (6, 368)? Round to the nearest hundredth.

• -2.21

• 6.31

• -2.91

• -0.73

Use Desmos to determine the linear regression model for this data set. Use the equation to predict how many words this student can type in 20 minutes.

• 1198 words

• 2500 words

• 1171 words

• 1162 words

After performing analyses on a set of data, Mrs. Schoeneck examined the scatter plot of the residual values for each analysis. Which scatter plot indicated the best linear fit for the data?

• A

• B

• C

The scatter plot shows the number coffee shops in different cities and the number of violent crimes. Which of the following is NOT true?

• A) As the number of coffee shops increase, violent crimes appears to increase.

• B) The line of best fit (regression line) shows a positive correlation

• C) The data has a positive correlation coefficient

• D) An increase in coffee shops causes an increase in violent crimes

Using your linear regression, what is y when x is 30?

• 61.59

• 52.46

• 57.94

• 59.76

Tags

CCSS.8.EE.B.5

If x is temperature and y is coffee sales, use the following linear model to determine the coffee sales in a 34° day. katex latex="y=6443-60x"

• $8483

• $4403

• $4673

• $6443

Tags

CCSS.HSF.LE.B.5