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Choose the correct option.
Read the following statements and choose the correct option: (I) If r = 0, then regression lines…
Read the following statements and choose the correct option:
(I) If r = 0, then regression lines are not defined.
(II) If r = 0, then regression lines are parallel.
(III) If r = 0, then regression lines are perpendicular.
(IV) If r = ±1, then regression lines coincide.
Which of the following is correct?
- (a)Only IV is correct
- (b)Only I and II are correct
- (c)Only I and IV are correct
- (d)Only III and IV are correct
Answer
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From ISC 2025 Specimen Mathematics Paper 1, question 19(ii).
Check your working with the Regression lines calculator: both regression lines, b_yx, b_xy and r from data, summary sums or the two lines; with estimates.