Which statement correctly describes the relationship between frequency and wavelength?

For any wave (that stays in the same medium), the product of

(frequency) times (wavelength)

is always the same number.  (It's the speed of the wave).

So if the frequency or wavelength suddenly gets multiplied by some number, then the other one immediately gets divided by the same number ... so that their product stays the same.  

That means that if one gets bigger, the other one gets smaller.

explanation:

the masses of the objects and the distance between them

if the person is shown to have +90n, then ans is -10n.

if the person is shown to have -90n, then ans is +10n.