Question

y is inversely proportional to the square of (
x  3
).
When x = 1 , y = 4.
Find y when x = 7

Answer 1

Answer:

y is proportion to 1/x2. This can be written as y=k/x2 where k is a constant of proportionality. Given that y=10 when x=5, k can be found as yx2 which is equal to 25.