The line is horizontal, therefore the slope is 0.
Answer=0
i think the question is not correct write it again or attach the pic ic
The volume of a rectangular prism can be given by the form

you know Volume, base, and height but you dont know width
so divide b and h to both sides

and you cna solve for width
now for 6.
dividing by a number is the same as multiplying by its reciprocal
What figure , are you trying to figure the volume for