Question

C is directly proportional to d such that

C = 1.5d
(a) Find c when d = 12
(b) Find d when c = 15​

Answer 1

we have

C = 1.5d

or

d=C/1.5

Explanation:

when d is 12

C=1.5×12=18

when c=15

d=15/1.5=10