Answer:
The constant of proportionality of a to b is the number that relates the values of a and b in a proportional relationship. If a is directly proportional to b, meaning that as b increases, a increases by the same factor, then the constant of proportionality is denoted by k and is given by:
k = a/b
This means that for any value of b, the value of a is equal to k times b. So, if b doubles, then a also doubles, and the value of k remains the same.