Modelling Associations Review

Which of the following scatterplots best demonstrates a line of best fit?

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Tags

CCSS.8.SP.A.2

The regression line equation for the graph shown is closest to...

• y = 3.8 + 2.9x

• y = -3.8 - 2.9x

• y = -3.8 + 2.9x

• y = 3.8 - 2.9x

A gardener tracks a correlation coefficient of 0.79 between the growth rate of his trees and the amount of fertiliser used. What can the gardener conclude from this result?

• An increase in tree growth increases the use of fertiliser

• An increase in the use of fertiliser increases the heath of the trees

• 79% of the variation in the growth rate of his trees can be explained by the variation in the amount of fertiliser used

• The growth rate of the trees influences the quality of the fertiliser used

Tags

CCSS.HSS.ID.C.9

When y = 0.54 + 15.87x, the value of y when x = 2.5 is...

• 18.91

• 40.215

• 39.135

• 6.888

Tags

CCSS.HSF.IF.A.2

The graph for the regression line equation y = 85 - 4x is most likely to be...

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Tags

CCSS.8.EE.B.5

A series of data points recorded a coefficient of determination value of 0.82. Calculate Pearson's correlation coefficient.

• 82%

• 0.18

• 0.67

• 0.91

Tags

CCSS.HSS.ID.C.8

For the following sample data set, which of the following is an example of interpolating data?

• Finding the value of x when y = -7

• Finding the value of y when x = 17

• Finding the value of x when y = 27

• Finding the value of y when x = 37

Tags

CCSS.HSF.LE.B.5

• y = 10 + x 

• y = 0.435 + 11.496x

• y = 0.876 + 0.936x

• y = 11.498 + 0.435x

Tags

CCSS.HSS.ID.C.8

Consider the regression line drawn on this scatterplot...

The gradient of the regression line is closest to...

Tags

CCSS.8.EE.B.5

Consider the regression line drawn on the scatterplot shown.

The equation of the regression line is...

• height = 0.75 x mass - 58

• height = 0.75 x mass + 58

• height = -0.75 x mass - 58

• mass = 0.75 x height + 58