Which description could be written as a linear function?

The parking lot of a store has the shape shown. all angles are right angles. what is the area of the parking lot?

The price of an item has been reduced by 30%. the original price was $30. what is the price of the item now ?

Deepak plotted these points on the number line. point a: –0.3 point b: – 3 4 point c: – 11 4 point d: –0.7 which point did he plot incorrectly?