The answer is the first one, A
Answer:

Step-by-step explanation:
move variable to the right-hand side and change its sign

divide both sides of the equation

The equation is y = 63/x
And y = 3 when x=21
Step-by-step explanation:
When y varies inversely with x, The inverse proportion is given by:
y ∝1/x
When the proportionality symbol is removed, a constant of proportionality is introduced

Putting y = 7 and x = 9

So,

Putting x =21

Hence,
The equation is y = 63/x
And y = 3 when x=21
Keywords: Proportion, variables
Learn more about proportion at:
#LearnwithBrainly
= -0.496 hope this helps a little doing know if it’s right or not