Which quadratic equation fits the data in the table?

y = x² + 4x + 1

y = x^2−4x+1

y = x^2−4x−1

y = −x^2−4x+1

Use a graphing calculator or other technology to answer the question.

Which quadratic regression equation best fits the data set?

yˆ = 1568.065x^2 − 115.265x + 2.608

yˆ = 2.608x^2 + 115.265x + 1568.065

yˆ = 2.608x^2 − 115.265x + 1568.065

yˆ = 1568.065x^2 + 115.265x + 2.608

What is the quadratic regression equation for the data set?

yˆ = 0.032x^2 − 0.601x − 0.255

yˆ = 0.032x^2 − 0.601

yˆ = 0.032x^2 + 0.601x − 0.255

yˆ = 0.032x^2 − 0.601x

oscar.a1551 Mar 1, 2019

#1**+2 **

I do not have a praphing calculator...but I can answer the first one....

Look at the data points

with x = 0 all of the equations will result in y=1 EXCEPT for the 3rd one...toss the 3rd choice

with x = 3 only the second equation yields y = -2 so it is the winner...

Just to be sure , check at x=4 for the second equation, y = 1 Check!

ElectricPavlov Mar 1, 2019