Question

HAVE NO IDEA HOW TO DO THIS QUESTION! HELP!!


What is the value of b in the quadratic regression equation for these points: (-3, 1.2), (1, 0.4), (5, 1.6), (11, 2.6)?
A. -0.976
B. -0.97
C. -0.01
D. 0.009

Answer 1

are you allowed to use a calculator? This looks like you should use quad regression
function on a calculator that does statistics.

Answer 2

yea, but i dont have one:/

Answer 3

so how do i figure out my answer?

Answer 4

try http://www.had2know.com/academics/quadratic-regression-calculator.html

Answer 5

okay I put in the plots but didnt get an answer yet.

Answer 6

I got this; y = 0.016x^2 - 0.0098x + 0.8601

Answer 7

I am guessing the b is the coefficient on the x term

Answer 8

what does that mean?

Answer 9

so would that make my answer B?

Answer 10

?

Answer 11

I am thinking about it. -0.0098 does not match any of your choices.

Answer 12

oh, it looks like you should round to the nearest hundredth

Answer 13

round -0.0098

Answer 14

i got B as my answer, is that correct?

Answer 15

to round -0.0098 to the nearest 100th (2nd place after the decimal) look at the 9 in the 3rd place. if 5 or bigger (and it is) round up: the 0 becomes 1

you get
-0.01

Answer 16

oh sorry I thought u said round to the nearest hundreth lol