Question

Medal Rewarded!


What is the value of b in the quadratic regression equation for these points: (2, 5), (4, 11), (5, 41), and (9, -2)?
A. -14.92
B. 10.76
C. 15.62
D. 26.06

Answer 1

@shamil98 please help?

Answer 2

i know for a fact its not D,

Answer 3

heres what I got for the quadratic regression equation

y = -2.4038x^2 + 26.0587x - 40.8238

Answer 4

now i just gota fiND OF THE VALUE OF B IN THE REGRESSION

Answer 5

26.0587
rounded to the nearest hundreth is
26.06.
I have no idea how to do this btw .. lol.

Answer 6

well the equation is in
y= ax^2 +bx +c

Answer 7

i know for a fact its not D as the answer, cause i got it wrong last time:)

Answer 8

oh. hm.

Answer 9

maybe @thomaster can help us?

Answer 10

@Luigi0210 can u help me?

Answer 11

hello?

Answer 12

I'm trying .-.

Answer 13

I think its C

Answer 14

Okay get back to me @Luigi0210

Answer 15

Wait, I think I got it..

Answer 16

yes! what do you think it is? and how did you get the answer?

Answer 17

According to my calculator it's D..

Answer 18

What I did first was type in the equation into the y=
The clicked on 2nd, y, and turned plot 1 on.
After that I went to STAT, edit, and plugged in the points.
Then I went to STAT, to the right on "calc" and down to #5 that says QuadReg

Answer 19

are you possitive that this may be the answer?

Answer 20

Not 100% >.<

Answer 21

hmm im sure you probably right, but ill check with a teacher:)

Answer 22

Alright, sorry I'm not much help >.<

Answer 23

its okay atleast your trying!:)

Answer 24

ill let you know if its right, my teachers correcting it:)

Answer 25

you are right!!!!:)

Answer 26

my guess was right o.o

Answer 27

yep!

Answer 28

Yes :D