Analyze the relationship between Price (P) and Quantity (Q) using the given data points and calculate the slope.

Step 1: Analyze the change in $Q$ with respect to the change in $P$ to determine the type of relationship.
Let's calculate the slope $\frac{\Delta Q}{\Delta P}$ for consecutive pairs of points:

• For $(P, Q) = (3, 10)$ and $(7, 22)$: $$\frac{\Delta Q}{\Delta P} = \frac{22 - 10}{7 - 3} = \frac{12}{4} = 3$$
• For $(P, Q) = (7, 22)$ and $(10, 31)$: $$$$