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 quad…

Question

asked Jul 22, 2019 120k views

1 Answer

Tuma · Answer 1 · 2019-07-27T08:12:03+0000

Answer:

The correct option is a.

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.