y - 3 = (-3/8)(x + 2)
Because,
The gradient has been inverted, showing that the line is perpendicular (indicated by the -1/m).
Additionally, slotting -2 in to that equation gives us 3, which is the y component we need (assuming that y is isolated, and made the subject, otherwise it would equal 0). This shows that this line passes through (-2, 3).