The whole numbers 10 to 12 are paired with their factors. explain why this pairing of numbers does not describe a function

On a string instrument, the length of a string varies inversely as the frequency of its vibrations. an 11-inch string has a frequency of 400 cylces per second. find the frequency of a 10-icnch string.

Write the fraction or mixed number and the decimal shown by the model

Can you me find the missing length. i attached an image.