Given the following forecasting data, using trend projection, the $y-$intercept of the prediction line is $q,$

$\backslash$table$[[$Month$,$Period,$\backslash$table$[[$Demand $($in$],[$Thousands$)]]],[$April$,1,19],[$May$,2,20],[$June$,3,18],[$July$,4,19],[$August$,5,17]]$

$-5$

$20\mathrm{.}1$

$10$

$-5$