Which relation represents a function?

How do i get the answer for 2/3 * 10/3

What scale factor was applied to the first rectangle to get the resulting image interior answer as a decimal in the box

Which is a true statement about an exterior angle of a triangle a. it is formed by two segments that are not sides of the triangle, b. it forms a linear pair with one of the interior angles of the triangle, c. it is complementary to one of the interior angles of the triangle. d. it is formed by two segments that are sides of the triangle.