Answer:
slope = 3
Step-by-step explanation:
Given a line with slope m then the slope of a line perpendicular to it is
[tex]m_{perpendicular}[/tex] = - [tex]\frac{1}{m}[/tex]
Given m = - [tex]\frac{1}{3}[/tex], then
[tex]m_{perpendicular}[/tex] = - [tex]\frac{1}{-\frac{1}{3} }[/tex] = 3
