7. The equation of a fine is \( y = - \frac { 1 } { 2 } x - 3 \) . Find the equation af a perpendicular line that goes through the \( x a m ( - 4,2 ) \)
\( y = 2 x + 9 \)
\( y = - 4 x + 1 \)
\( y = - \frac { 1 } { 2 } x - 2 \)
\( y = 2 x - 3 \)
\( y = 1\)