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Y= -3x+5/4 jd gradiennya -3/4
Krn tegak lurus m= 4/3
Y-2=4/3(x+1) smua dikali 3
3y -6=4(x+1)
3y-6= 4x+4
3y-4x-10=0
gradien adalah koefifien dari x dengan catatan koefisien y = 1
4y=-3x+5
y=-3/4 x + 5/4
m1 = -3/4
⊥ m2 ⇒ m1 . m2 = -1
m2 = 4/3
y-y1=m (x-x1)
y-2=4/3 (x+1)
3(y-2) = 4(x+1)
3y-6 = 4x+4
3y = 4x+10