Persamaan garis a adalah... A. [tex]4x - 3y + 12 = 0[/tex] B. [tex]4x + 3y - 10 = 0[/tex] C. [tex]3x - 4y + 9 = 0[/tex] D. [tex]3x + 4y - 8 = 0[/tex] Bantu jawa

PGL

Garis b

[tex] m_b = \frac{y_2 - y_1}{x_2 - x_1} \\
m_b = \frac{8 - 0}{0 - 6} \\
m_b = - \frac86 [/tex]

Garis b tegak lurus a, berlaku
[tex] m_a \cdot m_b = -1 \\
m_a \cdot (- \frac86) = -1 \\
m_a = \frac68 [/tex]

Persamaannya :
[tex] y = m_a(x - x_1) + y_1 \\
y = \frac68(x + 3) + 0 \ [\times \ 8] [/tex]
8y = 6(x + 3)
8y = 6x + 18
4y = 3x + 9
3x - 4y + 9 = 0

Jawaban : C

Jawabannnya yang
[tex]c[/tex]