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A survey of 50 families to study the relationships between expenditure on accommodation in (₹ x)…

Mathematics20254 marksShort answer
A survey of 50 families to study the relationships between expenditure on accommodation in (₹ x) and expenditure on food and entertainment (₹ y) gave the following results: $\sum x = 8500, \sum y = 9600, \sigma_x = 60, \sigma_y = 20, r = 0.6$ Estimate the expenditure on food and entertainment when expenditure on accommodation is ₹200. [Application]

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Linear Regression

From ISC 2025 Specimen Mathematics Paper 1, question 21(i).