Dew point temperature, in degrees Celsius (^\circ\text C)( ∘
C)left parenthesis, degrees, start text, C, end text, right parenthesis, is defined as the temperature to which the air would have to cool in order to reach saturation. For a temperature of 35^\circ\text C35
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C35, degrees, start text, C, end text, an estimate of the dew point can be obtained by first subtracting 20^\circ \text{C}20
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C20, degrees, start text, C, end text from the temperature, and then adding 1^\circ1
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1, degrees for every increase of 555 points in the relative humidity, RRR. If the dew point is 30^\circ \text{C}30
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C30, degrees, start text, C, end text, which of the following equations best models the situation?