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Whenever you are buying or selling most things. If one can of soup costs $0.75, how much does three cans cost? If the fabric is £7.99 per metre, how much will 4.3 metres be?
More complicated: a plumber charges £25 call out and then £35 per hour (or part). How much would a 2-hour job cost? Another charges £40 call out but £25 per hour. Is she cheaper or more expensive?
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Use of linear function in real life?
Your age is a linear function (of time).
How do you use rational function in real life?
Rational function can be used in real life in modeling multi-person work problems.
When can you use linear quadratic functions?
There are linear functions and there are quadratic functions but I am not aware of a linear quadratic function. It probably comes from the people who worked on the circular square.
How does polynomial function exist in real life?
As with most advanced math, if your "real life" involves engineering work, you will use such math; otherwise, you will hardly have anything to do, in this case, with polynomial functions.
What is an example of real life square root function?
electricians use the Square Root function when connecting 3 way outlets with the electral current of an intel processor.
