In a store, perhaps. People want it to be easy to shop, so it would be best for say, a top ramen package to be the same net weight as all the other top ramen packages. This makes it 1) easy to label and 2) easy to be confident buying, as it is exactly the same as all the others.
To find the area of a building.
and to make a small farm
I have attached the graph. Your axis is x=-4 and the vertex is (-4,-30)
Hope that helps
You’ll get your answer by adding +7 to each number.