What is the rate of change, or slope, for this set of ordered pairs: (-3,9 and (0,15) *please show work*

Step-by-step explanation:

slope, m=(y2-y1)/(x2-x1) in this case

m=(15-9)/(0- -3)

m=6/3

(m=2)

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step-by-step explanation:

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< 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⭐