‹ Back to the paper
Answer the following on regression and correlation.
Consider the following table: 3 5 ? 6 1 ? 3 2 Complete the table if .
Consider the following table:
Complete the table if $\bar{x} = 4,\ \bar{y} = 2$.
| $x$ | 3 | 5 | ? | 6 |
|---|---|---|---|---|
| $y$ | 1 | ? | 3 | 2 |
Answer
Answer
AI$\bar{x} = \dfrac{3 + 5 + a + 6}{4} = 4$, so $a = 2$.
$\bar{y} = \dfrac{1 + b + 3 + 2}{4} = 2$, so $b = 2$.
| $x$ | 3 | 5 | 2 | 6 |
|---|---|---|---|---|
| $y$ | 1 | 2 | 3 | 2 |
From ISC 2025 Improvement Mathematics Paper 1, question 19(iii)(a).