Respuesta :

k/-4 = - 0.8,
make k the subject of the equation by multiplying through by -4,
   this means,
(k/-4) x -4 = - 0.8 x -4
     this should give you k = -0.8 x -4, the negatives will cancel out to give you positive values,
                               so k= 3.2

your answer is D