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in Linear Equations by (42.6k points)
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In countries like U.S.A. and Canada temperature is measured in Fahrenheit whereas in countries like India, it is measured in Celsius. Here is a linear equation that converts Fahrenheit to 

Celsius F = 9/5 C + 32

i) Draw the graph of the above linear equation having Celsius on X-axis and Fahrenheit on Y axis. 

ii) If the temperature is 30°C, what is the temperature in Fahrenheit ? 

iii) If the temperature is 95°F, what is the temperature in Celsius ? 

iv) Is there a temperature that has numerically the same value in both Fahrenheit and Celsius ? If yes, find it.

1 Answer

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by (43.4k points)
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Best answer

i) Given that F = 9/5 C + 32

C 20 30 35 -40
F 68 86 95 -40

If C = 20, F = 9/5 × 20 + 32 = 68

If c = 30, F = 9/5 × 30 + 32 = 86

If C = 35, F = 9/5 × 35 + 32 = 95

If C = -40, F = 9/5 × (-40) + 32 = -40

ii) From the graph 30°C = 86°F 

iii) 95°F = 35°C iv) When C = – 40 then F = – 40

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