Question

What is the value of y when x= 2.5

Answer 1

Answer:

Explanation:

As

y

∝

1

x

2

, we have

y

=

k

x

2

or

x

2

y

=

k

.

As when

x

=

2.5

,

y

=

5

,

2.5

2

×

5

=

k

or

k

=

6.25

×

5

=

31.25

Therefore

x

2

y

=

31.25

Hence when

x

=

9

,

9

2

×

y

=

31.25

and

y

=

31.25

81

Answer 2

Answer:

Step-by-step explanation: