how can linear equations help us in real life?

Answer 1

I think they may be used quite frequently if your life inside and outside your job involves the natural and social sciences. Psychologists, for example, use a statistical analysis called the pearson correlation that is essentially a glorified linear equation. Basically it is used to assess whether a relationship exists between two things. For example, is there a correlation between the amount of time spent on Yahoo! Answers and mood?

One that I think is especially relevant concerns analysis of weather patterns. Over several eons, the earth has maintained the same temperature (no linear relationship between passage of time and temperature). However, recent analyses have suggested that the temperature has become increasingly linear in the past few years (referred to as the "hockey stick" trend). This is believed to be suggestive of global warming...pretty much the same thing that happens when we have a "cold" and we cough (earthquakes), sneeze (hurricanes), and sometimes a fever when its really bad.

Answer 2

Linear Equations In Real Life

Answer 3

Real Life Linear Equations

Answer 4

Linear equations are much much simpler to work with. Small pieces of some complicated curve can be approximated as lines. That is, suppose you observe some phenomena and the exact solution of the phenomena for all variables of interest is too complicated; but if you are only interested in predicting the behavior over a very small interval, then the approximate solution over the interval of interest can usually be approximated as a line. A real life example is the transistor. The equations that govern the behavior of solid state devices get messy almost immediately. However, if you use what is called “small signal approximation” you are able to make a linear approximation for the exponential function and the resulting algebra is much simpler to work with. The circuit will work just fine provided that you operate it in this “linear region”. You can of course deviate from this linear region, in which case we simply have other (linear) equations that predict device behavior for this other state. Together the total circuit function is “piecewise linear”.

Answer 5

Computing an unknown component using other associated values that are known is what is solving linear equations.

In everyday life we encounter the need to find out something using some constant/known components.
Some examples...

1) u ask the shopkeper to give you eggs worth Rs.20. The price of egg is known say Rs.2 each... 2*x=20 - x is the number of eggs
2) You need to drive to your friend's house for lunch (at 1:30). Your friend's house is 90 kms away from your house and you know you can drive at an average speed of 50 km/h. So, what time should you start from home??
t = 90/50, where t= time required

I bet you solve a 100 such equations (easy & complex) everyday, knowingly or unknowingly

Answer 6

I read somewhere (may be process dynamics by coughnour etc.) that most of the things in life are non-linear by nature and are approximated by linear equations because human learning is in that way. i.e. we can analyse linear equations in a more comprehensible way. So in real life linear equations can give us (fair enough) approximations.

Answer 7

Linear equations does help in real life in many situations. for examples you can see word problems in linear equations.

Answer 8

Some times our life runs linear but most of the it is the way we look at it.

Answer 9

in real life? nothing. In real life (private life), you only have to know addition and substraction.

well, at least, not usefull if you don't try to compare several financial products before buying one. That is, if, like most people, you trust your bank without thinking, then you won't need them.


But they're usefull for a lot of things all the same (at work, if you work in science or finance). Since the only equations a computer knows how to solve easily are linear equations, then they're the only kind of equations that are used, in the end.

Answer 10

Depends what IS your real life. If you're research scinetist - your life is practically dominated by equiations; some of them are linear.