What is a line of best fit used for?

To make it look like you know what you are doing

The scatter plot below shows the number of books read by students in Mrs. Hall’s English class and their final grades. Which statement represents the best description about the line of best fit?

The more books students read, the higher their English grade.

The more books students read, the lower their English grade.

The fewer books students read, the higher their English grade.

No relationship exists between the number of books students read and their English grades.

Charlie rented a moving truck. He paid a daily fee plus a per-mile fee to rent the truck. The equation below represents the daily amount Charlie paid for the truck if he drives it x miles. y=0.5x+10 What does the slope of the graph of this equation represent?

The per-mile fee for the moving truck

The daily fee for the moving truck

How much Charlie paid for the truck

Rich is a member of a gym. He pays a monthly fee plus a per-visit fee. The equation below represents the monthly amount Rich pays for his membership to the gym per month for x visits. y=3x+10 What does the y-intercept of the graph of this equation represent?

The number of times Rich goes to the gym

The total cost at the end of the month

Which of the following lines represents the line of best fit for the scatter plot?

There is no line of best fit for this graph

Which of the following lines represents the line of best fit for the scatter plot?

There is no line of best fit for this graph.

Which of the following lines represents the line of best fit for the scatter plot?

There is no line of best fit for this graph because there is no trend.

Which of the following lines represents the line of best fit for the scatter plot?

There is no line of best fit for this graph because there is no trend.

Which of the following lines represents the line of best fit for the scatter plot?

There is no line of best fit for this graph because there is no trend.

What is the equation of the line of best fit?

y= 1 2 x + 3 \frac{1}{2}x\ +3 2 1 x + 3

y= − 1 2 x + 3 -\frac{1}{2}x\ +3 − 2 1 x + 3

Scatter Plot & Line of Best Fit

Quiz

•

Mathematics

•

8th Grade

•

Practice Problem

•

Medium

•

CCSS

8.EE.B.5, HSS.ID.C.7, HSF-LE.A.1B

+14

Standards-aligned

Patrick Lynch

Used 18+ times

FREE Resource

39 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

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

Tags

CCSS.HSF.IF.B.4

CCSS.HSS.ID.B.6

CCSS.HSS.ID.C.7

2.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

The number of siblings you have and your weight.

Positive correlation

Negative correlation

No correlation

All of the above

Tags

CCSS.HSF-LE.A.1B

3.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

What type of correlation (association)?
The outside temperature and the amount of layers you wear.

Positive correlation

Negative correlation

No correlation

All of the above

Tags

CCSS.HSF-LE.A.1B

4.

MULTIPLE CHOICE QUESTION

3 mins • 1 pt

Find the slope for the trend line using points (2,2) and (4,3)

2

1/2

-2

-1/2

Tags

CCSS.8.EE.B.5

5.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

Which scatter plot shows a linear relationship between x and y?

Graph A

Graph B

Graph C

Graph D

Tags

CCSS.8.F.A.3

6.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

What is the correlation?

Negative correlation

No correlation

Positive correlation

All of the above

Tags

CCSS.HSF-LE.A.1B

7.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

As the age of the car increases, its value decreases. Which scatterplot represents this relationship?

A

B

C

D

Tags

CCSS.8.EE.B.5

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Scatter Plot & Line of Best Fit

39 questions

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.

The number of siblings you have and your weight.

What type of correlation (association)?The outside temperature and the amount of layers you wear.

Find the slope for the trend line using points (2,2) and (4,3)

Which scatter plot shows a linear relationship between x and y?

What is the correlation?

As the age of the car increases, its value decreases. Which scatterplot represents this relationship?

What is a line of best fit used for?

What type of correlation does this graph have?

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What type of correlation (association)?
The outside temperature and the amount of layers you wear.