$P=4t+10$ In a pottery shop , the seller sets his target as given in the above equation, where $P$ is the amount in dollars he earns and $'t'$ is the number of toys he makes each day . Based on this what can be the estimated increase in the amount each week ?

Question

$\begin{array}{1 1} (a)\;4 \\ (b)\;14 \\(c)\;28 \\(d)\;30 \end{array} $