Cyclical influences on demand are often expressed graphically as a linear function that is either upward or downward sloping.

True or FalseThe following table contains the demand from the last $10$ months:

a$.$ Calculate the single exponential smoothing forecast for these data using an a of $0\mathrm{.}10$ and an initial forecast $(f_1)$ of $28.$

Note: Round your answers to $2$ decimal places.

b$.$ Calculate the exponential smoothing with trend forecast for these data using an a of $0\mathrm{.}10,$ a $$ of $0\mathrm{.}20,$ an initial trend forecast $(T_1)$ of

$1\mathrm{.}00,$ and an initial exponentialy smoothed forecast $(F_1$:$)$ of $27\mathrm{.}00.$

Note: Round your answers to $2$ decimal places.

$9\mathrm{.}1.$ Calculate the mean absolute deviation $($MAD$)$ for the last nine months of forecasts.

Note: Round your answers to $2$ decimal places.

c$\mathrm{.}2.$ Which is best?

Single exponential smoothing forceast

Exponential smoathing with trend forecast