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x1=2
y1=3
m=½
y-y1=m(x-x1)
y-3=½(x-2) [masing² ruas di kali 2]
2y-6=x-2
2y-x=-2+6
2y-x=4
dik: y1 = 3
x1 =2
m = 1/2
Solusi:
y-3 = 1/2(x-2)
y-3 = 1/2x-2/2
y-3 = 1/2x-1
y = 1/2x-1+3
y= 1/2x-2