Explain the steps i need it quick. 2y+y=18

In the diagram, the ratio of ab to ae is (1/2) . what is the ratio of the length of to the length of ?

If y varies directly as x2 and y=6 when x=6, find the constant of variation.

Compare the following pair of numbers a and b in three ways. a. find the ratio of a to b. b. find the ratio of b to a. c. complete the sentence: a is percent of b. a=120 and b=340 a. the ratio of a to b is . b. the ratio of b to a is . c. a is nothing percent of b.