I want want to fence a section of my land. Put up two strands of barbed wire. My "Section" is (6mil X 6mil). Cost is $.39 per yard. How much will it cost me?

Aline is perpendicular to another line m2= (-1/m1), where m1 is the slope of the original line and m2 is the slope of the perpendicular line. which of the following equations represents the line that passes through the point (-2,1) and is perpendicular to the line below?