Chapter 9 - Correlation and Regression

What does "b" represent in y=a + bx?

• y-intercept

• slope

• x-intercept

• nothing

What is the slope in the equation:  y=4x+3

• 3
• 4x
• 4
• x

Tags

CCSS.8.EE.B.5

What is the y-intercept in the following equation:  y= -5 - 4x

• -4
• -4x
• 5
• -5

Tags

CCSS.8.EE.B.6

CCSS.8.F.A.3

The _________________ ____________________ measures the strength of the relationship between 2 variables.

• Correlation Coeffiecient
• Causation
• Independent Variable

Tags

CCSS.HSS.ID.B.6

CCSS.HSS.ID.C.8

What graph best shows correlation? 

• Bar Graph
  
• Histogram
• Ogive
• Scatterplot

Describe the correlation in the graph shown.

• Strong Negative

• Strong Positive

• Weak Negative

• Weak Positive

Describe the correlation in the graph shown.

• Strong Negative

• Strong Positive

• Weak Negative

• Weak Positive

What is the correlation?

• Negative correlation
• No correlation
• Positive correlation
• Cannot be determined

Tags

CCSS.HSF-LE.A.1B

You are analyzing a scatter plot that has a negative correlation. What is true of the of the x and y values?

• As x increases, y decreases
• As x increases, y increases
• As x decreases, y decreases

The correlation coefficient r is a value between

• 0 and 1
• 0 and 100
• -1 and 1
• -2 and 2

Tags

CCSS.HSS.ID.C.8