Answer:
(1) is a function, surjective aka onto,
not bijective aka one to one.
domain is {3,6,12,14,20,22},
range is {4,15,8,11}. More elements in domain means it can't possibly be one to one.
(2) is a relation but not a function, although its inverse is a function. There are fewer elements in the domain than the range, so a function could not be onto but would have to be into or injective.
The relation you get by restricting the domain to {1,19} is a function, injective, so that the image of the domain is a proper subset of the range.
*Use the Pythagorean Theorem
a^2 + b^2 = c^2
6^2 + 5^2 - c^2
36 + 25 = c^2
61 = c^2 *Square root 61
c^2 (c squared) = about 7.8
Answer:
this is the full solution of your question
