Coding (Edexcel A-Level Mathematics): Quizzes

To simplify calculations with large numbers

The original data value

To shift the data

To scale the data

It doesn't change the shape

$\bar{x} = b\bar{y} + a$

$\bar{y} = \frac{\bar{x} - a}{b}$

$\text{Var}(x) = b^2 \times \text{Var}(y)$

$\text{SD}(x) = b \times \text{SD}(y)$

Only $b$

60

With large numbers or awkward decimals