CUET Mathematics 2025 29 May Shift 2 PYQs

The sale of ice creams is higher in summer than in winter is an example of

Which of the following statements are correct?

(A) The method of least squares determines the position of the trend line of the given time series.

(B) The trend line is called the line of best fit.

(C) The line of best fit is a line in which the sum of deviations of the actual values of the variable from their corresponding trend value is always positive.

(D) The normal equations of the trend line $y = a + bx$ are $\sum y = na + b\sum x$, $\sum x \cdot ext{and} \sum xy = a\sum x + b\sum x^2$, where $n$ is the numbers of observations.

Choose the correct answer from the options given below:

For the given values 27, 35, 42, 45, 51, 34, 43; the five yearly moving averages are:-