Question

Is 3v - 5=d proportional or not (please explain)

Answer 1

3v-5=d 
In this case, v is proportional to d.  Meaning that as you increase the value of v, then the value of d will change at a proportional rate.  For example, if v was 1 then d would be -2.  Then if v was 2 then d would be 1.  If v was 3 then d would be 4.  The value of d increases 3 for every increase in v.  Does that help?