Question

y is inversely proportional to the square of (x + 1).y = 0.875 when x = 1.Find y when x = 4.

Answer 1

Step-by-step explanation:

Explanation:

If

y

is inversely proportional to the square of

x

, then

XXXX

y

=

c

x

2

XXXX

for some constant

c

We are told that when

y

=

50

then

x

=

2

So the proportional equation becomes

XXXX

50

=

c

2

2

XXXX

→

c

=

25

2

So

XXXX

y

=

25

2

x

2

which could also be written as

XXXX

x

2

y

=

25

2

or

XXXX

2

x

2

y

=

25