Giving the !

which option bests describes the relationship: h(x) =1/2x2?
quadratic variation
direct linear variation
inverse variation
explain how you got your answer to question #2 using 1-2 complete sentences

which option bests describes the relationship: xy = 12?
direct linear variation
quadratic variation
inverse variation
explain how you got your answer to question #4 using 1-2 complete sentences.

the length, g, of a cello string varies inversely as the frequency, f, of its vibrations (cycles per second). suppose it is known that an 18-inch-long cello string vibrates 300 cycles per second.
write an inverse variation equation for the situation above.
then, show how to find the frequency of a 15-inch-long cello string.