Question

Which year is the best prediction for when 1206 people will attend graduate school?

Answer 1

Answer:

D year 15

Step-by-step explanation:

Given:

y= 8x^2-40x+6

year is the best prediction for when 1206

Finding value of x for y=1206

8x^2-40x+6= 1206

8x^2-40x+6-1206=0

8x^2-40x-1200=0

Solving the above by quadratic formula:

x= $\frac{-b\sqrt{b^{2}-4ac } }{2a}$

 = $\frac{40\sqrt{40^{2}-4(8)(-1200) } }{2(8)}$

x= 15 and x= -10

As year can not be negative, hence correct answer is

D: year 15!