Correlation Math

Describe the correlation:

r = -0.98

• Strong positive

• Weak positive

• Strong negative

• Weak negative

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

• Yes

• No

The red line represents the line of best fit for the scatter plot. How many ice cream sales are expected if the temperature is 90°?

• 55

• 0

• 103

• 100

Based on this data, how much money would the carpenter earn from a job that took 3 days to complete?

• $740

• $1000

• $550

• $1740

Which with is the line of best fit?

• Black

• Orange

• Red

• Blue

A correlation value (r) that has a strong, positive linear association would have a value close to

• 1

• 0

• -1

• Cannot be answered

Which graph represents a positive correlation?

• 
• 
• 
• 

Based on the graph, if Joe earned $400, how many hours did he work?

• 25 hours

• 35 hours

• 45 hours

• 15 hours

r=0.3

• Strong positive

• Weak positive

• Strong negative

• Weak negative

Choose the graph with a trend line that best fits the data.

• graph 1

• graph 2

• graph 3

• graph 4