Answer: y=39
Explanation:
Y(2)-Y(1)/X(2)-X(1)
7-1/5-2=6/3=2
Y-Y(1) = m (X - X(1))
Y-1 = 2 (X-1)
Y-1 = 2X -2
Y = 2X -1
Y= 2(20) -1
Y=39
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