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rumus -> x-x1/x2-x1 = y-y1/y2-y1
-> x-(-3)/2-(-3) = y-8/5-8
-> x-3/5 = y-8/-3 (kali silang)
-> -3(x-3) = 5(y-8)
-> -3x+9 =5y-40
-> -3x-5y = -49
y1 = 8
x2 = 2
y2 = 5
M1 = y2 - y1 = - 3
x2 - x1 4
M untuk persamaan garis yang tegak lurus adalah :
M1. M2 = -1
-3 . M2 = - 1
4
M2 = 4
3
persamaan garis tegak lurusnya :
y-y1 = m(x-x1)
y- 8 = 4/3 (x+3)