Bivariate Data

What type of association does this graph have?

• positive
• negative
• none
• all of the above

Tags

CCSS.HSF-LE.A.1B

Which scatter plot could have a trend line whose equation is y hat= 3x + 10?

• A

• B

• C

• D

Tags

CCSS.HSA.CED.A.2

CCSS.HSS.ID.B.6

CCSS.HSS.ID.C.7

What kind of trend is shown from this scatterplot?

• positive correlation
• negative correlation
• none
• cannot be determind

Tags

CCSS.HSS.ID.B.6

CCSS.HSS.ID.C.8

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

The equation of the trend line

is y hat= 1/2x +1. What does the x variable represent?

• The number of laps

• The amount of time in hours

• The amount of time in minutes

• How long it takes to go 0 laps

Tags

CCSS.HSA.CED.A.2

CCSS.HSS.ID.B.6

CCSS.HSS.ID.C.7

What is a line of best fit used for?

• To make predictions
• To make the graph look pretty
• To connect the points
• To make it look like you know what you are doing

Tags

CCSS.HSS.ID.B.6

CCSS.HSS.ID.C.7

Describe the correlation in the graph shown.

• Strong Negative
• Strong Positive
• Weak Negative
• Weak Positive

Tags

CCSS.HSF-LE.A.1B

A baseball coach graphs some data and finds the line of best fit. The equation for the line of best fit is

y hat= 0.32x - 20.51, where x is the number of times at bat and y is the number of hits.

How many hits should be expected from a player who is at bat 175 times?

• 35 hits

• 49 hits

• 609 hits

• 62 hits

Tags

CCSS.HSA.SSE.A.1

CCSS.HSF.IF.A.1

CCSS.HSF.IF.A.2

CCSS.HSS.ID.C.7

Joe tracked the height of his Dalmatian puppy from age 13 weeks to 25 weeks. He graphed the data and determined the line of best fit is y hat= 1.12x + 28.78. What does the slope represent in this situation?

• The puppy weighed 28.78 pounds at age 13.

• For every week that goes by, the puppy gains 1.12 pounds.

• The puppy gains a pound every 1.12 weeks.

• The puppy weighs 1.12 pounds when it was born.

Tags

CCSS.HSF.LE.B.5

CCSS.HSS.ID.C.7

A veterinarian student tracks the weight of a kitten, in ounces, from the age of 0 to 32 weeks. She graphs the data and determines the line of best fit is y hat = 4.03x + 3.27. What does the y-intercept represent in this situation?

• The kitten weighs 3.27 ounces when it's born.

• The kitten weighs 4.03 ounces when it's born.

• The kitten gains 3.27 ounces a week.

• The kitten gains 4.03 ounces a week.

Tags

CCSS.HSS.ID.C.7