<PRE><B>Question 85674</B>
Since the lines are perpendicular, the slopes are opposite reciprocals of each other. So, you want to switch the x and y coefficients and also change the sign:

3x + 4y = C

Plug in the x and y coordinates of the desired point:

3(6) + 4(1) = C
18 + 4 = C
22 = C

Equation is 3x + 4y = 22</PRE>