Question

Which of the following statements are true regarding functions?

A. A function is a relation in which multiple values of the input variable are paired with at least one of the output variable.

B. A sequence is a function whose domain is the set of rational numbers.

C. The vertical line test may be used to determine whether a relation is a function.

D. The horizontal line test may be used to determine whether a function is one-to-one.

***Choose all that apply :)

Answer 1

I think C and D are two of the answers.... I'm not 100% sure tho... am i right about those 2?? and what about the others? :O

Answer 2

C is correct, the vertical line test is a visual test to see if a relation is a function

Answer 3

D is also correct, if a relation passes the vertical line test, it's a function

if a function passes the horizontal line test, then it's a one-to-one function

Answer 4

what do you think about B

Answer 5

sorry my computer froze but its good now haha hold on lemme seee

Answer 6

ok

Answer 7

does B apply also??? cuz domain is rational #s and range is irrational??

Answer 8

take a look at this page

http://www.acadia.k12.la.us/view/899.pdf

Answer 9

tell me what a sequence is (according to that page)

Answer 10

it is a function whose domain is a set of all natural #s

Answer 11

so B is false

Answer 12

right?

Answer 13

yes, B is false because the rational numbers and the natural numbers are two completely different sets

Answer 14

is A wrong too then?

Answer 15

hmm A doesn't clearly nail down what a function really is

sure a function could match that description, but a relation that isn't a function could also match the description

Answer 16

so the asnwer to this is C,D ?? :D

Answer 17

so I'd say it's false

Answer 18

yes it is

Answer 19

yay :) thx!

Answer 20

yw