Solution: P(X)=(20-X)*(30+3x)
Analysis: We know X= dollar decreases. And we have the statements:
We have an initial profit of $ 20. For each X dollar we decrease in profit, the amount of bouquets per week increase three.
So we have part of the equation:
P(X)=Profit* Amount of bouquets.
Profit =(20-x)
Amount of bouquets (30+3x)
[tex]\begin{gathered} P(x)=(20-x)(30+3x) \\ P(x)=600+\bar{60x}-30x-3x^2 \\ P(x)=-3x^2+30x+600 \end{gathered}[/tex]