Kebri LTD. sells Radios and Televisions. They have recorded their monthly revenue as follows:
Revenue in Ksh '000' (Y): 321, 287, 209, 397, 388, 224, 344, 464, 433, 315
Radio Units (X₁): 58, 71, 95, 105, 114, 126, 171
What is the coefficient of determination (R²) for the relationship between revenue and radio units?
a) 0.724
b) 0.835
c) 0.903
d) 0.654