Will give brainliest for correct answer

first and third are functions and second is not

Step-by-step explanation:

4 = function

5 = function

6 = not a function

Step-by-step explanation:

The first two pass the vertical line test

while the last ne doesn't

i dony know

step-by-step explanation:

< 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⭐