The volume of a prism is given by:

We know that the height is x. The length is 25 shorter than x, this can be express as:

The width is 14 longer than x, this can be express as:

Plugging the expressions for the length, the width and the height we have that:

Therefore, the volume of the prism is:
As the independant variable increases, the dependant variable increases at a constant rate creating a linear relationship.
Answer:
x=4/3
Step-by-step explanation:
2+4=2(x-1) original
6=2(x-1) combine like terms
6=2x-2 multiply x-1 by 2
8=2x add 2 to both sides
4=x divide both sides by 2