Graphs and Charts
Painting by Numbers
Chart for Chart Sake
Wavy Lines

In secondary school we continue with graphs and charts. We need to be able to work out the angles for pie charts - this means we have to understand a little about the circle and work out angles from fractions or percentages. We need to be able to collate data and select the best type of graph to represent it.

Spreadsheets can help us in preparing professional output. This ensures we provide well presented labels, titles and legends.

As the title implies we can also use graphs to trend wavy or sinusoidal lines. These can be based on angle or time. When applied to engineering we usually use time as the x-axis, whether the waves are relating to alternating current or voltage in electrical systems, or rotation in dynamics.

Graphs and charts help us visualise and make sense of our data.