The annual enrollment of a university for the last nine years is recorded in the table. Year 1 2 3 4 5 6 7 8 9
Students (thousands) 9.5 8 8.5 7.5 6.5 6.5 8.5 8.5 9
What quadratic function best models this set of data?

answer: it is d

step-by-step explanation:

answer: options

step-by-step explanation:

there is no graph so i cant sorry

step-by-step explanation:

answer: (-8,4) are the coordinates of a

step-by-step explanation:

let the side of square abcd is x .

thus the area of square abcd is .

now, by the diagram area of triangle ead= 1/2 × ea × ad = 1/2 × ea × x

( because ad is the side of square)

and, according to the question,

the areas of square abcd and right ead are equal.

⇒

⇒ea=2x

thus, ea: ab=2: 1

therefore, point a divides line segment eb into the ratio 2: 1.

⇒ by sectional formula coordinates of a are,

=

=

=(-8, 4)

thus the coordinates of a are (-8,4)