Linear Regression Review Activity

Given the linear regression equation: y = 2x + 5, where x is the number of minutes spent studying and y is the score in an Algebra quiz. What is the slope of the given equation?

• A) 2

• B) 5

• C) 0

• D) -2

Given the linear regression equation: y = 2x + 5, where x is the number of minutes spent studying and y is the score in an Algebra quiz. What is the y-intercept of the given equation?

• A) 2

• B) 5

• C) 0

• D) -5

Given the linear regression equation: y = 2.5x + 13, where x is the year and y is the population (millions). What is the y-intercept of the given equation?

• A) 2.5

• B) 13

• C) 0

• D) -13

Given this data where the slope is -5.6 and the y-intercept is 6. What is the Linear Regression Equation?

• A) y = 6x + 6.5

• B) y = -5.6x - 6

• C) y = -5.6x + 6

• D) y = -6x - 5.6

Find the correlation coefficient or r-value of the graph.

• 0.9

• -0.6

• 0.02

• -0.006

Determine whether the points in the scatter plot have positive correlation, negative correlation, or no correlation. Then determine which r-value is most accurate.

• positive correlation

  r = 0.8

• negative correlation

  r = -0.8

• positive correlation

  r = 0.01

• negative correlation

  r = -0.08

The points are _______ with ________ association.

• close together

  positive

• far apart

  no association

• far apart

  positive

• close together

  negative

Determine whether the points in the scatter plot have positive correlation, negative correlation, or no correlation.

• negative correlation

• positive correlation

• no correlation

Which r-value indicates a strong positive correlation?

• r = 0.8

• r = -0.8

• r = 1

• r = -0.08