Question

If y varies inversely as the square of x, and y= 1/8 when x=1, find y when x=5

Answer 1

y = k / x² ( y varies inversely as the square of x )

y = 1/8 when x = 1:

1/8 = k / 1²

8 k = 1

k = 1/8

For x = 5:

y = 1/8  / 5² = 1/8 : 25 = 1/8 · 1/25 = 1/200

Answer: A ) 1/200

Hope This Helps!!!

Answer 2

Solution is given in image attached.