If you understand the definition of a mathematical function, a good way to judge it is that any line drawn parallel to the y-axis intersects with the values in the function’s curve only once. The same ...

Whether presenting a project at school, delivering a critical report at work, or simply trying to make sense of your budget, graphs are efficient and visually appealing means of conveying complex ...

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Is your chart boring? Try Excel’s people chart to liven things up. Susan Harkins shows you how. A people chart is an infographic, which leads me to a second definition. An infographic tells a story, ...

To calculate the Consumer Price Index between two years in Excel, take a sum of all the amounts spent on the basket of products over those two years. Then use the following formula to find the CPI ...

To help draw a straight line graph from its equation, fill in a table of 𝑥 and 𝑦 values. Plot the pairs of values as coordinates and join to make a line. Make sure you are confident with ...