If you understand the definition of a mathematical function, a good way to judge it is that any line drawn parallel ... Index or CPI in Excel and create its graph. Karan is a B.Tech, with several ...

Save guides, add subjects and pick up where you left off with your BBC account. A line graph is used to spot trends in data over time. In order to produce a line graph, data is required.

There is a title which tells you what the data in the time graph is about. The horizontal (X) and vertical (Y) axes or lines are labelled to tell you what data has been collected and when.