Best choice for variables.....I would let students be " s " and parents be " p "
The answer is c.2/3
Because the points went up 2 and across 3
If every shelf has the same amount of books, then it can be seen as proportional because one shelf has 43 and 2 have 86, and it keeps going up in a consistent way.
so 43/1 = 86/2 .
Happy studying ^-^
