An Analyst Performs and External Standard Calibration for Fentanyl and Obtains

Multiple Choice

An analyst performs and external standard calibration for fentanyl and obtains the following data points (concentration in ppb, area counts) :
20.0, 9599
50.0, 21456
100.0, 45326
250.0, 102391
500.0, 210561
What is the R2 value of the resulting linear equation (3 decimal places) ?

A) 0.926
B) 0.999
C) -0.926
D) -0.999
E) none of the above