of graph paper.

Forecast September sales volume using each of the following:

The naive approach

A five$-$month moving average

A weighted average using $\mathrm{.}60$ for August, $\mathrm{.}30$ for July, and $\mathrm{.}10$ for June

Exponential smoothing with a smoothing constant equal to $\mathrm{.}20,$ assuming a a March forecast of $19(000)$

A linear trend equation