Question

Tolong bantuu :
Persamaan garis yang tegaklurus dengan garis y = 9x -4 dan melalui (-1,1) adalah...!!?

Answer 1

Y = 9x - 4
m = 9

m1 × m2 = -1
9 × m2 = -1
m2 = -1/9

y - y1 = m (x - x1)
y - 1 = -1/9 (x + 1) --> kali 9
9y - 9 = -1 (x + 1)
9y - 9 = -x - 1
9y + x = -1 + 9
9y + x = 8

Answer 2

M1 = 9
m2 = -1/m1
= -1/9
y-y1 = m(×-×1)
y- 1 = 1/9 ( ×+1)
---------------- ×9
9y - 9 = 1(×-1)
9y - 9 = × -1
x-1 +9 -9y =0
×-9y +9 -1 =0
x-9y + 8 = 0//

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