Help me.. graph of resistance vs temp. of a semiconductor

The relationship is:

R = R_∞e^T₀/T

where R_∞ is the value that the resistance (R) approaches as the temperature (T) gets very large and depends
on the sample, T₀ is a characteristic temperature for the semiconductor. The quantity T₀ can be different for
each type of semiconductor material (silicon, germanium, etc.). The above relationship for the
semiconductor only applies if the temperature is expressed in Kelvin. (T_Kelvin = T_Celsius+273)

[copied from google... and thanx.. i too din know this :)]