How many independent variable$/$s are used for each of these regression equations?

$3$

O $1$

$2$

$4$

Problem $3.$ Rebecca, the manager of Ferguson restaurant forecasted the dinner covers for two months, and has the following figures:

Period

$\backslash$table$[[$Forecast$,$Actual$],[350,400],[380,375]]$

Question $42$

Calculate the smoothing constant with the given data.