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gradien(m) = -a/b
m = -2/-5 = 2/5
kemudian:
titik (-3,4) digunakan sebagai x1 dan y1
y-y1 = m(x-x1)
y-(-3)= 2/5 (x-4)
y+3 =2/5x -8/5
y =2/5x -8/5 -3
y = 2/5x -8-15/5
y =2/5x -23/5
Jadi persamaan garisnya y =2/5x -23/5