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March 27th, 2015, 11:28 AM  #1 
Member Joined: Jan 2015 From: Norway Posts: 95 Thanks: 1  Temperature linear regression calculator
task 4.222 The table below shows the resistance R(t) measured ohm in a copper wire with the temperature measured in Celsius T (degrees celsius) :0 16 22 36 49 60 75 R(t) (ohm): 56 59.5 60.8 63.9 66.7 69 72.3 D) How many degrees has the temperature risen when resistance has risen with 1 ohm The book says the answer is 4.6 degreees but i don't know how the answer is found? 
March 30th, 2015, 06:15 AM  #2 
Senior Member Joined: Mar 2011 From: Chicago, IL Posts: 214 Thanks: 77 
Resistance has risen TOTAL with 72.3  56 = 16.3 ohm when temperature has risen TOTAL with 75 degrees. So if 16.3 ohm ~ 75 degrees, then 16.3 times lesser 1 ohm ~ 75 ÷ 16.3 ≈ 4.6 degrees. 

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