A community for students.
Here's the question you clicked on:
 0 viewing
anonymous
 3 years ago
Find a quadratic function to model the values in the table. Predict the value of y for x = 4.
XY
13
02
335
anonymous
 3 years ago
Find a quadratic function to model the values in the table. Predict the value of y for x = 4. XY 13 02 335

This Question is Closed

anonymous
 3 years ago
Best ResponseYou've already chosen the best response.0the constant must be \(2\) so you have \[y=ax^2+bx2\] as a start now we can set up a couple equations in \(a\) and \(b\)

anonymous
 3 years ago
Best ResponseYou've already chosen the best response.0let \(x=1\) you get \[ab2=3\] or\[ab=1\]

anonymous
 3 years ago
Best ResponseYou've already chosen the best response.0let \(x=3\) you get \[9a+3b2=35\] or \[9a+3b=33\]

anonymous
 3 years ago
Best ResponseYou've already chosen the best response.0solve the system \[ab=1\]\[9a+3b=33\] to get your answer

anonymous
 3 years ago
Best ResponseYou've already chosen the best response.0multiply first equation by 3, add it to the second get \[12a=36\] so \(a=3\) therefore \(b=2\) and you get \[y=3x^22b2\]

anonymous
 3 years ago
Best ResponseYou've already chosen the best response.0oops \[y=3a^22x2\]

anonymous
 3 years ago
Best ResponseYou've already chosen the best response.0so it would be y=3a^22x2;58

anonymous
 3 years ago
Best ResponseYou've already chosen the best response.0yes for the first one

anonymous
 3 years ago
Best ResponseYou've already chosen the best response.0it would be \[y=3x^22x2\] with an \(x\) not an \(a\)

anonymous
 3 years ago
Best ResponseYou've already chosen the best response.0thanks so much. i've been working on this thing all weekend....

anonymous
 3 years ago
Best ResponseYou've already chosen the best response.0wait so 4 is going to be 56?
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.