Question

The data set represents a month-to-month progression of gasoline prices over the course of several months in an unspecified city. Use a graphing calculator to determine the quadratic regression equation for this data set.

Answer 1

Answer:

The correct option is a.

Step-by-step explanation:

The general form of a quadratic regression equation is

$y=ax^2+bx+c$                         ..... (1)

Using graphing calculator we get

$a=-0.143393\approx -0.143$

$b=0.59525\approx 0.595$

$c=2.82964\approx 2.830$

Substitute these values in equation (1) to find the quadratic regression equation for this data set.

$y=-0.143x^2+0.595x+2.830$

Therefore the correct option is a.