This is false. Kites can be shaped in many different ways so not all kites are rhombuses. Also, even the kites that look like rhombuses may not be rhombuses. Most kites have 2 pairs of sides with the same length. But, in order to be a rhombus all the sides have to be the same length but not all sides are the same length on a typical kite.
A coefficient is the (big) number in front of a number that tells you how many times you multiply the main number
Answer:
(5,0)=x1,y1
(0,3)=x2,y2
so the range will be x1-x2/