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Usimov [2.4K]
3 years ago
14

Assume each variable has a different value. Which relations below are functions? a. {(a, b), (a, c), (a, d), (a, e)} b. {(a, b),

(b, b), (c, b), (d, b)} c. {(a, b), (c, d), (e, f), (g, h)} d. {(a, a), (b, c), (c, c), (d, e)}
A. choice a only

B. choices b and c only

C. choice c only

D. choices b, c, d only
Mathematics
2 answers:
Inessa05 [86]3 years ago
5 0
I think its D but im not 100% sure let me know if its right
Mashutka [201]3 years ago
3 0

A <u>function</u> is a <u>relation</u> in which every<u> input value</u> x has at most one<u> output value</u> y.

Consider all options:

a. Relation {(a, b), (a, c), (a, d), (a, e)} is not a function, because input value a has four different output values b, c, d and e.

b. Relation {(a, b), (b, b), (c, b), (d, b)} is a function, because every input value a, b, c and d have at most one output value b.

c. Relation {(a, b), (c, d), (e, f), (g, h)} is a function, because every input value a,  c, e and g have at most one output value b, d, f and g, respectively.

d. Relation {(a, a), (b, c), (c, c), (d, e)} is a function, because every input value a,  b, c and d have at most one output value a, c, c and e, respectively.

Answer: correct choice is D

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