Question 156043
(6,-2); 7x+6y=5
6y=-7x+5
y=-7x/6+5/6 this line has a slope=-7/6. (red line)
A perpendicular line has a slope=6/7.
-2=6*6/7+b
-2=36/7+b
b=-2-36/7
b=(-2*7-36)/7
b=(-14-36)/7
b=-50/7
Thus the equation of the perpendicular line through (6,-2)is:
y=6x/7-50/7 (green line).
{{{ graph( 300, 300, -10, 10, -10, 10, -7x/6 +5/6, 6x/7 -50/7) }}} (graph 300x300 pixels, x from -10 to 10, y from -10 to 10, of TWO functions -7x/6 +5/6 and 6x/7 -50/7).