MCQ
The straight line trend is represented by the equation:
- A$y_c=a-b x$
- B$y _{ C }= na -b \Sigma x$
- C$y_c=a+b x$
- D$y _{ C }= na +b \Sigma x$
(c) $y_c=a+b x$
Explanation: $y_c=a+b x$
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