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The length L (in centimetre) of a copper...

The length L (in centimetre) of a copper rod is a linear function of its Celsius temperature C. In an experiment, if `L" "=" "124. 942` when `C" "=" "20` and `L=" "125. 134` when `C" "=" "110` , express L in terms of C.

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Step 1: Use the general form of linear function
The general form of linear function is `f(x)=ax+b`
It is given that the length L (in centimeter) of a copper rod is a linear function of its Celsius temperature C.
So, let `L=aC+b ` …(1)
...
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NCERT ENGLISH-STRAIGHT LINES-EXERCISE 10.2
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