Y=4^x which is the function of the graph

Create another three examples that does not behave like a function. explain why your chose each example to fit the category be very

If the ratio of sum of the first m and n terms of an ap is m2 : n2 , show that the ratio of its mth and nth terms is (2m − 1) : (2n − 1).

Find the common ratio of the sequence. -4, 8, -16, 32, a: -12b: -2c: 12d: -1/-2