To see how the formula that relates Celsius and Fahrenheit temperatures is derived,

Use the method given in Exercise 103 to estimate the Fahrenheit temperature given C = 30. Then use the equation from Exercise 101 to find F when C = 30. How do the temperatures compare?

Data from in Exercise 101 & 103

A quick way to estimate Fahrenheit temperature for a given Celsius temperature is to double C and add 30. Use this method to estimate F if C = 15.

Use the slope found in Exercise 100(b) and one of the two points determined earlier, and write an equation that gives F in terms of C.

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\ 40 30 20 0 -20 10 20 -30 -40 -40 10 20 30 80 40 50- 60 100 120 140