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
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!