Question

1. Given that y is proportional to the cube of x, and that y = 48 when x - 2, calculate the value of
x when y = 6


2. Given that y varies as the cube of x, and that y = 48 when x = 6, find the value of y
when x = 9.​

Answer 1

Step-by-step explanation:

Explanation:

y

∝

x

y

=

k

x

when

x

=

2

,

y

=

5

5

=

k

(

2

)

∴

k

=

5

2

When

x

=

16

,

y

=

(

5

2

)

(

16

)

y

=

40