Mary is analyzing a quadratic function f(x) and a linear function g(x). will they intersect? which coordinates if they do? negative or positive or both?

Find the slope of the line below . enter your answer as a fraction or decimal. use a slash mark ( / ) as the fraction bar if necessary

Anyone know? will mark brainliest if correct!

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.