Bivariate Data Equations

• Positive Association
• Negative Association
• No Association
• Non-Linear Association

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

___ data for two variables.

• trivariate

• bivariate

• positive

• negative

Is this line an accurate line estimate of best fit for the data?

• Yes

• No

Tags

CCSS.8.EE.B.5

What is the equation of the line of best fit?

• y= 6x + 2

• y = -2x +6

Tags

CCSS.8.EE.B.5

What is the equation of the line of best fit

• y= -2x + 10

• y= 10x+ 2

• y=2x+10

• y= 10

Tags

CCSS.8.EE.B.5

What is the equation of the trend line?

Tags

CCSS.8.EE.B.5

A city manager made a scatter plot of the number of retail stores in the city over the years. A scatter plot had a trend line with an equation of y=11x+12, where y is the total number of retail stores and x is the number of years since 1990. Use the equation to predict the number of retail stores in the city in 1997. (7 years later).

• 89

• 77

• 7

• 98

Tags

CCSS.HSF.BF.A.2

Several schools reported the number of students who received a flu vaccine in a year and the number of cases of the flu amongst their students that year. A scatter plot was made with a trend line that had an equation of y=-\frac{1}{4}x+85. Use the equation to predict the number of cases of the flu that would occur if 300 students received he flu vaccine.

• 75

• 160

• 300

• 10

Tags

CCSS.HSF.BF.A.2

A scatter plot was created to show the length of a person's vacation and the weight of the suitcase they packed. The equation of the trend line is y=5x+15, where x represents the length of the trip.

Use the equation to predict the weight of a suitcase for someone taking a 9-day trip.

• 45

• 60

• 15

• 55