Y ∝
√
x

If
y
=
45
when
x
=
81
find,
y
when
x
=
225

y = 75

Step-by-step explanation:

Given that:

   y

⇒ y = k

where k is the constant of proportionality.

When y = 45, x = 81, then;

45 = k

45 = 9 k

k =

  = 5

k = 5

So that,

y = 5

the value of y when x = 225 is;

y = 5

  = 5 x

  = 5 x 15

y = 75

combine all like terms then its just a 2 step equation

your answer is c. 97 (don't delete this again)

step-by-step explanation: