4. Which of the following relations is a function?

A. {(5, –4), (–4, 5), (–5, 4), (4, –5)}

B. {(–7, 6), (6, –7), (–7, 9), (10, 3)}

C. {(2, –3), (–3, 2), (2, 3), (–2, 3)}

D. {(8, –5), (–5, 8), (–5, –8), (–8, 5)}

Guys i really need or i have to stay late up night

Atextile fiber manufacturer is investigating a new drapery yarn, which the company claims has a mean thread elongation of 12 kilograms with a standard deviation of 0.5 kilograms. the company wishes to test the hypothesis upper h subscript 0 baseline colon mu equals 12 against upper h subscript 1 baseline colon mu less-than 12 using a random sample of n equals 4 specimens. calculate the p-value if the observed statistic is x overbar equals 11.8. round your final answer to five decimal places (e.g. 98.76543).

Jayne is studying urban planning and finds that her town is decreasing in population by 3% each year. the population of her town is changing by a constant rate.true or false?