Which of the following are normal equations to fit a straight line trend y = a + bx by the method of least squares?
CUET UG 2025 — Mathematics Statistics & Applications
Which of the following are normal equations to fit a straight line trend y = a + bx by the method of least squares?
Held on 16 May 2025 · Verified 13 Jul 2026.
Options
- A
∑y=a+∑x+b∑x2, ∑xy=a+∑x+b∑x2
- B
∑y=na+b∑x, ∑xy=a∑x+b∑x2
- C
∑xy=na+b∑x, ∑xy=na+b∑x2
- D
∑x=na+b∑y2, ∑y=a∑x+b∑y2
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