Wk21Day3 Analyze Line of Best Fit Eqtns 11-3a

A car’s fuel efficiency, in MPG, every year for 8 years is recorded in the table.

The linear equation y = -2.8x + 40 can be used to model the data in the table.

What is the meaning of -2.8 in terms of the context?

• The car’s fuel efficiency increases by about 2.8 mpg each year.

• The car’s fuel efficiency decreases by about 2.8 mpg each year.

• The car started with about 2.8 mpg when it was new.

• The car’s fuel efficiency decreases by exactly 2.8 mpg every year.

A car’s fuel efficiency, in MPG, every year for 8 years is recorded in the table.

The linear equation y = -2.8x + 40 can be used to model the data in the table.

What is the meaning of 40 in terms of the context?

• The car’s fuel efficiency increases by about 40 mpg each year.

• The car’s fuel efficiency decreases by about 40 mpg each year.

• The car started with about 40 mpg when it was new.

• The car’s fuel efficiency decreases by exactly 40 mpg every year.

The price of Nintendo stock over 6 years is graphed to left. y = 12.42x + 5 can be used to model the data in the graph.

What is the meaning of 12.42 in terms of the context?

• The stock cost about $12.42 before the data starts.

• The stock price increased by exactly $12.42 each month.

• The stock price increased by about $12.42 each month.

• The stock’s price decreased by about $12.42 each month.

The price of Nintendo stock over 6 years is graphed to left. y = 12.42x + 5 can be used to model the data in the graph.

What is the meaning of 5 in terms of the context?

• The stock cost about $5 before the data starts.

• The stock price increased by exactly $5 each month.

• The stock price increased by about $5 each month.

• The stock’s price decreased by about $5 each month.

What type of association does this graph have?

• positive 
• negative
• none
• all of the above

Tags

CCSS.8.F.B.4

CCSS.HSF.LE.A.2

What type of association does this graph show?

• Positive
• negative
• none
• all of the above

Tags

CCSS.HSF-LE.A.1B

Which Line of Best Fit could be used for this data?

• 
• 
• 
• 

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

• A
• B
• C
• D

Tags

CCSS.8.EE.B.5

Which sentence describes the relationship shown on this scatter plot?

• As the temperature decreases, the visitors increase. 
• As the temperature increases, the number of visitors increases. 
• As the visitors increase, the temperature decreases. 
• No correlation

Tags

CCSS.HSF-LE.A.1B

Select the statement that best describes the line.

• The line is the line of best fit.
• The line is NOT a line of best fit because it does not pass through two points.
• The line is NOT a line of best fit because it does not go through the middle of the data set.
• The line is NOT a line of best fit because it does not go through the origin.

Tags

CCSS.8.EE.B.5