CUET Mathematics - Which of the following are normal equations to fit a straight line trend y = a + bx by the method of least squares? | PYQs + Solutions

CUET Mathematics 2025 16 May Shift 1

Statistics & Applications

Medium

applied

$\sum y = a + \sum x + b \sum x^2$ , $\sum xy = a + \sum x + b \sum x^2$

$\sum y = na + b \sum x$ , $\sum xy = a \sum x + b \sum x^2$

$\sum xy = na + b \sum x$ , $\sum xy = na + b \sum x^2$

$\sum x = na + b \sum x^2$ , $\sum x = a \sum x + b \sum x^2$

✅ Correct Option: 2

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CUET Mathematics 2025 16 May Shift 1 PYQs