Question

Persamaan garis yang melalui titik P(-2,7) dan Q(6,9) adalah...

Answer 1

X₁ = -2
y₁ = 7
x₂ = 6
y₂ = 9

y - y₁ / y₂ - y₁ = x - x₁ / x₂ - x₁
y - 7 / 9 - 7 = x + 2 / 6 + 2
y - 7 / 2 = x + 2 / 8
8 ( y - 7 ) = 2 ( x + 2 )
8y - 56 = 2x + 4
8y = 2x + 4 + 56
8y = 2x + 60

Answer 2

M = ( 9 - 7 ) : ( 6 + 2 )
m = 2 : 8
m = 1/4

y = 1/4x - ( -1/2 - 7 )
y = 1/4x + 15/2
y = 1/4x + 30/4
4y = x + 30
x - 4y + 30 = 0