What is the value of x in 6/15 = x/9

Hi my sisters and brothers can tell me the answer because i don’t understand the question

Drag each tile to the correct box. not all tiles will be used. consider the recursively defined function below. create the first five terms of the sequence defined by the given function

Write two point-slope equations for the line passing through the points (6, 5) and (3, 1)