The data shown has a least-squares regression line of y=3.2x−6.4.
1 answer:
Answer:
1) B. on, 2) D. 19.2, 3) C. 0
Step-by-step explanation:
1) The value of y according to the regression line is:
Hence, the point (8,19.2) is <em>on </em>the least-squares regression line.
2) The value of y according to the regression line is 19.2.
3) The residual is the difference between the value from the regression line and the real value. In this case, the residual value is 0.
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We can use the pythagorean theorm. This means that the points can form the two legs of a triangle.
a = 6
b = 6
c = length AB
a^2+b^2 = c^2
2(6^2) = c^2
72 = c^2
c would be
or 
a = 6
b = 6
c = length AB
a^2+b^2 = c^2
2(6^2) = c^2
72 = c^2
c would be