1. Which of the following relations is a function? a) {(1,9), (2, 4), (2, 3), (4, 15)} b) {(2,7), (7, 9), (9, 7), (3, 14)} c) {(5, 1), (7, 1), (5, 6), (12, 1)} d) {(1, 4), (1, 12), (8, 13), (16, 23)}

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A:

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A: In this question, we need to find the least squares error in the least squares solution.

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A: Since you have asked questions with multiple subparts so we will solve first three subparts for you.

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A: This question can be solved using the concept of area of sector and segment.

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A: Topic:- algebra

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Q: 5+277575

A: Topic:- simplification

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A: Let's find distance(x).

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A: Please refer to the image below

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A:

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A: Explained below

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A:

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A: simplify the expression.

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A: Above question is solved.

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A: Let's solve Q and R factorization of matrix.

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A: Here is the solution:

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