BRAINLIEST IF RIGHT WITH EXPLANATION! What’s the equation for g(x)?

Each of the walls of a room with square dimensions has been built with two pieces of sheetrock, a smaller one and a larger one. the length of all the smaller ones is the same and is stored in the variable small. similarly, the length of all the larger ones is the same and is stored in the variable large. write a single expression whose value is the total area of this room. do not use any method invocations.

Which expression can be used to determine the slope of the line that passes through the points -6, three and one, -9

How do you solve a question like this?