R and B are directly proportional variables. When R = 9, B = 3. What does R equal when B = 14?

R and B are directly proportional variables. Therefore, we can write a relationship between them as R = kB where k is a proportionality constant. We can rearrange this equation to calculate the value of k:
R = kB, therefore k = R/B = 9/3 = 3
We can then use this proportionality constant to calculate our new value of R:
R=kB = 3 x 14 = 42