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 $ 26, while 3000 shirts can be sold at a price of $ 8. Give a linear equation in the form p=mn+b that gives the price p they can charge for n shirts.

p=?

I need help solving this. Please give me some detailed help, step by step so i can understand it.
Thank you.

Question

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 $ 26, while 3000 shirts can be sold at a price of $ 8. Give a linear equation in the form p=mn+b that gives the price p they can charge for n shirts. 

p=?

I need help solving this. Please give me some detailed help, step by step so i can understand it.
Thank you.