A community for students.
Here's the question you clicked on:
 0 viewing
cutiecomittee123
 one year ago
Which equation defines a function?
a. x= y
b. y=[[x]]
c. x=1/8y^2
d. x^2+y^2=49
cutiecomittee123
 one year ago
Which equation defines a function? a. x= y b. y=[[x]] c. x=1/8y^2 d. x^2+y^2=49

This Question is Closed

ybarrap
 one year ago
Best ResponseYou've already chosen the best response.2Remember that a function can have ONE value for every y value. Do the vertical line test. Graph the equation and if more than ONE point goes through any part of the graph, it is NOT a function. Try this vertical line test on this function (your last one): http://www.wolframalpha.com/input/?i=x%5E2%2By%5E2%3D49

cutiecomittee123
 one year ago
Best ResponseYou've already chosen the best response.0So the last one doesn't work since it is a circle.

cutiecomittee123
 one year ago
Best ResponseYou've already chosen the best response.0a is just a line c is a parabola

ybarrap
 one year ago
Best ResponseYou've already chosen the best response.2Does a) and b) pass the vertical line test?

cutiecomittee123
 one year ago
Best ResponseYou've already chosen the best response.0b passes. a on the other hand could?

ybarrap
 one year ago
Best ResponseYou've already chosen the best response.2Could or does? dw:1433718220009:dw

cutiecomittee123
 one year ago
Best ResponseYou've already chosen the best response.0So then b is a function right??

cutiecomittee123
 one year ago
Best ResponseYou've already chosen the best response.0a doesnt pass

ybarrap
 one year ago
Best ResponseYou've already chosen the best response.2Correct on last two! dw:1433718284617:dw

cutiecomittee123
 one year ago
Best ResponseYou've already chosen the best response.0So y=[[x]] defines a function

ybarrap
 one year ago
Best ResponseYou've already chosen the best response.2Check it! What's the equation look like?

cutiecomittee123
 one year ago
Best ResponseYou've already chosen the best response.0Not too sure?

ybarrap
 one year ago
Best ResponseYou've already chosen the best response.2I think it may mean take the integer part. Checking now

cutiecomittee123
 one year ago
Best ResponseYou've already chosen the best response.0Hey well I have another question so I've got to go:)

ybarrap
 one year ago
Best ResponseYou've already chosen the best response.2This is the closet  http://planetmath.org/integerpart In this case, it passes the vertical line test

cutiecomittee123
 one year ago
Best ResponseYou've already chosen the best response.0c is a parabola and can be a function but I dont know

cutiecomittee123
 one year ago
Best ResponseYou've already chosen the best response.0I think b was just a better representation
Ask your own question
Sign UpFind more explanations on OpenStudy
Your question is ready. Sign up for free to start getting answers.
spraguer
(Moderator)
5
→ View Detailed Profile
is replying to Can someone tell me what button the professor is hitting...
23
 Teamwork 19 Teammate
 Problem Solving 19 Hero
 Engagement 19 Mad Hatter
 You have blocked this person.
 ✔ You're a fan Checking fan status...
Thanks for being so helpful in mathematics. If you are getting quality help, make sure you spread the word about OpenStudy.