I need help finding f (0)

What are the equivalent ratios for 24/2= /3= /5.5=108/ = /15

Two variables, x and y, vary inversely, and x=12 when y=4. what is the value of y when x=3?

Boris needs to buy plastic spoons. brand a has a box 42 spoons for $2.37. brand b has a box of 72 spoons for $3.57. find the unit price for each brand. then state which brand is the better buy based on the unit price. round your answer to the nearest cent.