Algebra 2 - How to determine if a table of a function is an example of direct variation

The video tutorial explains direct variation, where a function follows the rule Y = KX, with K as a constant. It describes how to determine if a relationship is a direct variation by checking if the ratio y/X is constant across different coordinates. The tutorial demonstrates calculating K for various coordinates and confirms direct variation if K remains consistent. Finally, it shows how to write the direct variation equation using the constant K.

Calculate the value of K for the coordinates (214, 2), (21, 3), and (35, 5). What do you find?

If K is equal to 7, how would you write the equation of the direct variation?