Got Homework?
Connect with other students for help. It's a free community.
Here's the question you clicked on:
 0 viewing
heathernelly
Group Title
State whether the relationship between the variables in the table is a direct variation, an inverse variation, or neither. If it is a direct or inverse variation, write a function to model it.
x=3,9,13,20
y=9,27,39,60
I know it's direct but how do I write a function model to it?
 one year ago
 one year ago
heathernelly Group Title
State whether the relationship between the variables in the table is a direct variation, an inverse variation, or neither. If it is a direct or inverse variation, write a function to model it. x=3,9,13,20 y=9,27,39,60 I know it's direct but how do I write a function model to it?
 one year ago
 one year ago

This Question is Closed

hartnn Group TitleBest ResponseYou've already chosen the best response.2
check : if the product xy is constant for all pairs of x,y then the variation is inverse, but if the ratio y/x is constant for all pairs of x,y then the variation is direct.
 one year ago

heathernelly Group TitleBest ResponseYou've already chosen the best response.0
but I don't get how to write a function model to it? :/
 one year ago

hartnn Group TitleBest ResponseYou've already chosen the best response.2
so did u get it as inverse or direct ?
 one year ago

heathernelly Group TitleBest ResponseYou've already chosen the best response.0
direct? it says in my notebook if both x and y increases then it's direct
 one year ago

heathernelly Group TitleBest ResponseYou've already chosen the best response.0
ooh, do i just put the numbers into the equation y=k/x?
 one year ago

hartnn Group TitleBest ResponseYou've already chosen the best response.2
yes, here if you note then, y/x = 9/3 = 3 y/x = 27/9 =3 y/x = 39/13 =3 so , you see everytime the ratio y/x turns out to be = 3 hence your function will also be y/x =3 or y =3x.
 one year ago

hartnn Group TitleBest ResponseYou've already chosen the best response.2
yes, thats what i did, y= kx for direct . 9=k *3 > k=3 so, y=3x :)
 one year ago

heathernelly Group TitleBest ResponseYou've already chosen the best response.0
I get it now! thank you very much :D xx
 one year ago

hartnn Group TitleBest ResponseYou've already chosen the best response.2
welcome ^_^
 one year ago
See more questions >>>
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.