Question $1(3$ points$)$

$4-9($a$).$ John Smith has developed the following forecasting model: hat$(Y)=36+4\mathrm{.}3x_1$

where

hat$(Y)=$ demand for $K10$ air conditioners

$x_1=$ the outside temperature $(*F)$

a$.$ Forecast the demand for $K10$ when the temperature is $70F.$

$330$

$337$

$340$

$345$