Question

What number goes on the blank? 2000, 400, 80, 16, _____ . What is the function?: linear, exponential, or neither. Write down the function expression for the sequence. It should be the form "y = ..."

Answer 1

2000,400,80,16, = missing answer is 3.2

This is because everything on the linear

declines by dividing y by 5 for x = 3.2 * 5

so for rate of change = 5/3.2 = 1.56

An expression for y = y- 64 = 2 2 8 X - 63. (0,12)

or y = y-5 = - 3x -1

which = 3.2 -5 = -2.8 x 5 = -14

Explanation: