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.

The correct option is a.

Step-by-step explanation:

The general form of a quadratic regression equation is

                        ..... (1)

Using graphing calculator we get

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

Therefore the correct option is a.

the smallest possible measurement of the width is 14 feet

step-by-step explanation:

let's assume length of parallelogram is 'l'

width of parallelogram is 'w'

the perimeter of a parallelogram must be no less than 40 feet

so, we get

we are given

length of parallelogram is 6 feet

so,

l=6

we can plug it

now, we can solve for w

subtract both sides by 12

divide both sides by 2

and we get

so,

the smallest possible measurement of the width is 14 feet