exam Maths Puzzle Numerical Ability

decide wether the relation is a function . If it is a function ,give the domain and the range input output
0 2
1 4
2 6
3 8

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exam Other Question

Can someone help me with this problem?

I need to find the first and third quartiles, Q1 and Q3, of the following set of numbers:

13,7,15,13,13,12,9,11,19,9

Thanks,
Sher What is the solution of the inequality 0 ≥ �c/6?