Linear Equation Word Problems - Examples & Practice

A clothing business finds there is a linear relationship between the number of shirts, $n$, it can sell and the price, $p$, it can charge per shirt. In particular, historical data shows that 1000 shirts can be sold at a price of $\$30$, while 3000 shirts can be sold at a price of $\$22$. Find a linear equation in the form $p=mn+b$ that gives the price $p$ they can charge for $n$ shirts.