For which data set is a linear regression most reasonable

A)a set of nine data pairs with a correlation coefficient r = –0.4

B)a set of five data pairs with a correlation coefficient r = 0.3

C)a set of four data pairs with a correlation coefficient r = –0.8

D)a set of six data pairs with a correlation coefficient r = 0.6

5/6

step-by-step explanation:

if i remember correctly with perpendicular stuff you just take away the negative

< coa = 150 ( given)

as ba and bc are tangents

so oc and oa is perpendicular to cb and ab respectively because in circle normal passes through centre

so in quadrilateral oabc

< coa + < oab + < ocb + < abc = 360

150 +90+90 + < abc = 360

330 + < abc = 360

< abc = 360 -330 = 30

so < abc = 30

⭐dhruv⭐