tolong kak plis.......................

m = ( y2 - y1 ) / ( x2 - X1 )
m = ( - 5 + 4 ) / ( 5 + 7 )
m = - 1 / 12

sejajar m1 = m2 = - 1/12

pers garis
y - y1 = m ( x - X1 )
y + 4 = - 1/12 ( x - 6 )
y = - 1/12 x + 1/2 - 4 ( dikali 12)
12y = - x + 6 - 48
12y + x = - 42