By Garret Patton
on the 11th of June, 2012
Graphs are a good way to show formulae in visual form.
For example, a taxi firm uses the following graph to work out the cost of a journey.
We can find out lots of different information from this graph.
The labels on each axis are very important. The horizontal line - or x axis - shows the number of miles. The vertical line - or y axis - tells us the cost.
There are two marked points at (0, 2) and (10, 7).
Read up from 6 miles on the x axis to the straight line. When you reach the line move across horizontally until you reach the y axis. The cost is £5. This means a journey of 6 miles will cost £5.
on the 20th of January, 2013