As the number of farms has decreased in the United States, the average size of the remaining farms has grown larger, as shown in the table. What are the units of slope?

years per average acre per farm

Using the data table what can you conclude?

The year and the average acreage of per farm is positively correlated.

The year causes the acreage of farms to increase.

The year and the average acreage of per farm is negatively correlated.

A morning radio talk show is running a “Winder Coat Campaign” to collect and deliver coast to local shelters. They are storing the coats until they reach their goal of 2100 coats. The table shows the number of coats in storage at the end of each day of the campaign. What does the y-intercept of the line of best fit represent in the context of the problem?

The predicted number of coats they had on Day 0

The average number of coats they brought in each day

The predicted number of coats they had on Day 7

The predicted number of days it will take to collect their goal of 2100 coats

Ms. Moreland noticed that as the number a tardies a student had increased their grade in class decreased. What can you conclude?

The number of tardies a student has is negatively correlated with their grade.

The number of tardies to class causes the students grade to decrease.

A students grade causes a student to be tardy.

The number of tardies a student has is positively correlated with their grade.

Mr. Jenson noticed that when number of roses sold at his store increases so does the number of chocolates. Does this mean roses causes more chocolates to be sold? What is the lurking variable?

No the lurking variable could be Valentines day.

Yes there is no lurking variable.

No the lurking variable is the number of cards sold.

AA Unit 1 Linear Models Review

Authored by Kirsten Moreland

Mathematics

9th - 11th Grade

CCSS covered

Used 26+ times

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30 questions

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MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Estimate the value of r:

-0.7

0.35

0.89

Tags

CCSS.HSS.ID.C.8

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Estimate the value of r:

0.99

0.05

-0.99

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Estimate the value of r:

0.03

-0.99

0.79

-0.72

Tags

CCSS.HSS.ID.C.8

MULTIPLE CHOICE QUESTION

3 mins • 1 pt

If the correlation coefficient of a table of data is 0.90, what is true about the line of best fit?

There is a weak, positive relationship

There is a strong, positive relationship

There is a weak, negative relationship

There is a strong, negative relationship

Tags

CCSS.HSS.ID.B.5

MULTIPLE CHOICE QUESTION

5 mins • 1 pt

Using your calculator find the line of fit.

y = .25x + 8.25

y = 8.25x + .25

y = x + 1

MULTIPLE CHOICE QUESTION

5 mins • 1 pt

Using your calculator, what is the correlation coefficient for the table?

-1

.25

8.25

Tags

CCSS.HSS.ID.C.8

MULTIPLE CHOICE QUESTION

5 mins • 1 pt

The line of best fit is y = .25x + 8.25. What is the slope with unit?

.25 inches per widget

.25 widgets per inch

8.25 widgets per inch

8.25 inches per widget

Tags

CCSS.HSF.LE.B.5

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AA Unit 1 Linear Models Review

Estimate the value of r:

Estimate the value of r:

Estimate the value of r:

If the correlation coefficient of a table of data is 0.90, what is true about the line of best fit?

Using your calculator find the line of fit.

Using your calculator, what is the correlation coefficient for the table?

The line of best fit is y = .25x + 8.25. What is the slope with unit?

The line of best fit is y = .25x + 8.25. What is the y intercept with units?

y = 13x +143 is the least squares regression line. What is the slope with units?

y = 13x +143 is the least squares regression line. What is the y intercept with units.

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