Are the following exponential functions a model for growth or decay?

2y= 3 2 x−2 y = − 1 3 x + 1 y=− 3 1 x+1

1. writing an equation for an exponential function by 2. a piece of paper that is 0.6 millimeter thick is folded. write an equation for the thickness t of the paper in millimeters as a function of the number n of folds. the equation is t(n)= 3. enter an equation for the function that includes the points. (-2, 2/5) and (-1,2)

If x is 6, then 7x= a. 13 b. 42 c. 42x d. 76