Answer:
C.It is multiplied by 1/2
Step-by-step explanation:
If x and y are directly proportional, that means that every change in x will result in same change in y. The change should be multiplicative/proportional, not additional. You can put it in this equation
y= kx
where k is a constant.
If the x is halved(x2= 0.5x1), the y will change into
y2/y1= kx2/ k1x1 = 0.5x1/ x1= 0.5
The value of y will be half of its value before. In another word, it will be multiplied by 1/2
