Sometimes the chart will show values that are not reliable. In that case, it would be good to emphasize to the observer that the error exists, and how its tolerance is. For this purpose, error lines are used that express a potential error, relative to the point or marker for the given data set. They can also be used to highlight some future trends, or to make assumptions about future value data.
Charts are often expected to present the current state and projection of future events. Nobody reliably knows what will happen in the future, but by approximating past data, it is possible to identify trends. Trend, by definition, represents the general direction of development or change. Excel sets trends and displays them using the trend line by application of various mathematical functions.
Each chart consists of more elements that determine its appearance. This is, first of all, the way data are shown within a group (Data Series) or a single series (Data Point). Depending on the type of data, different charts are being used: Column, Bar, Line, Surface, Pie … Accordingly, the elements of such charts are: title, legend, axes, background … By adding or removing elements we ‘re getting the more effective report.
Errors in the calculations are a common thing. The more data in the table and the formula are the more likely we are mistaken. Excel immediately shows us an error as soon as it comes in, but it’s not always easy to find out how it came to it. Also, sometimes it may happen that we miss the error because there was no mistake in mathematical operations. Excel has several options for detecting and finding errors, which will be said in the following text …
The reports we analyse are often composed of a large number of interrelated formulas. Then it is convenient, for a moment, to display formulas instead of the expression. It may also be useful to look at the precedents of a formula (the cells on which it was created), as well as its dependents (the values on whose result it affects). The purpose of these procedures is to easily detect errors in the budget, or the logic that led to them.