How do i solve use the GCF and the distributive property to express a sum as a product

One-third of the people from country a claim that they are from country b, and the rest admit they are from country a. one-fourth of the people from country claim that they are from country a, and the rest admit they are from country b. in a combined census of the two countries, one-half of the total claimed to be from a. what is the ratio of the populations of country a to that of country b.

Which of these tables represents a non-linear function?

Ineed with math stuff it involves graphs