USA HISTORY

Detailed explanation-1: -A time-series graph shows how the value of a particular variable or variables has changed over some period of time. One of the variables in a time-series graph is time itself. Time is typically placed on the horizontal axis in time-series graphs. The other axis can represent any variable whose value changes over time.

Detailed explanation-2: -Popularized in manufacturing, the principle of an assembly line is where each worker is assigned a repeatable task, and where the process moves to the worker who performs another task until the product is completed.

Detailed explanation-3: -An assembly line is a manufacturing process which is a very important part of industry. In an assembly line, parts are added to a product in a sequence. Each worker and machine does one part, and the parts are put together to make the finished object.