Answer:A)Y =k x
Y =5x
B.Y=60
Explanation:
Given that Y is directly proportional to x
mathematically , it Is represented as
Y ∝ x
Introducing the constant of proportionality, k. we have that
Y =k x
Now when y=30, x=6, k becomes
30=k 6
k=30/6=5
we now have the equation connecting them as
Y =5x
B) Now when x=12, y becomes
Y =5x
Y =5 X 12
Y=60