The wind$-$chill index $is$ modeled $by$ the function

$W=13\mathrm{.}12+0\mathrm{.}6215T-11\mathrm{.}37v^{0\mathrm{.}16}+0\mathrm{.}3965T{v}^{0\mathrm{.}16}$ temperature decreases $by1C?(Round$ your answers $to$ two decimal places.$)$

$C$ drop

What $if$ the wind speed increases $by1k\frac{m}{h}$ while the actual temperature stays constant $atT=-18C?$

$C$ drop