Function or not a function?

not a function

Step-by-step explanation:

in a function, the x value cannot be repeated

however, the y value can be repeated

answer: the first one

step-by-step explanation: use a calculator and divide the minutes by the dollars.

< 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⭐