Graphs are used for many things in daily life. Here are some examples:
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we will do maths daily in our life but for calculations it takes a lot of time so in shortcut Vedic maths was used. so it is important for us in daily life
they aren't used in real life, not unless you need them in a situation were you would need to use them.
Scatter graphs are best. Line graphs are OK if the trend is linear but not much good if the trend is non-linear.
In my daily life, I have no use for the surface area and or volume of a cube. None whatsoever.
The answer depends on WHERE daily life!