Question

Y is directly proportional to the square root of x

x
If
y
=
60
when
x
=
36
find,
x
when
y
=
80

Answer 1

Explanation:

y=k
`√(x)`

60=k
`√(36\\)` =k6

k=60/6 =10

This is your equation

y=10
`√(x)`

Put the numbers in

80=10
`√(x)`

80/10=8 then you have to square this so

`8^(2)`=64

x=64