Tessa hits a baseball up into the air from a height of 4 feet. The graph represents the height of the baseball above the ground, in feet, as a function of the horizontal distance the ball travels, in feet.

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)