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marcitahr
marcitahr
11.03.2021 • 
Mathematics

The table shows students’ scores on two papers A 2-column table with 8 rows. Column 1 is labeled Paper 1 with entries 38, 25, 32, 40, 21, 35, 33, 28. Column 2 is labeled Paper 2 with entries 95, 65, 77, 92, 48, 85, 67, 73.
Let x represent the paper 1 score (out of 40) and ŷ represent the predicted paper 2 score (out of 100). Which correctly states the equation for the least-squares regression line and the interpretation of its slope?
ŷ = 5.2 + 2.2x; scoring 1 more point on paper 1 is associated with a 2.2-point increase on paper 2.
ŷ = 5.2 + 2.2x; scoring 2.2 more points on paper 1 is associated with a 1-point increase on paper 2.
ŷ = 2.2 + 5.2x; scoring 1 more point on paper 1 is associated with a 5.2-point increase on paper 2.
ŷ = 2.2 + 5.2x; scoring 5.2 more points on paper 1 is associated with a 1-point increase on paper 2.

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