Use a transformation to solve the equation.
k/-4 = - 0.8
a.
k = –3.2
b.
k = –0.2
c.
k = 0.2
d.
k = 3.2

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