Question

What is the constant of variation for the quadratic variation?

Answer 1

A. 8
B. 16
C. 24
D. 40

Answer 2

Have you considered calculating Second Differences?

Answer 3

I'm not so good at that....

Answer 4

hold on...

Answer 5

I'm deciding on A or B

Answer 6

is it B. 16?

Answer 7

What did you get when you calculated the second differences?

Answer 8

I got 16.

Answer 9

Okay, then what is the model?

y = 16x^2 -- Perhaps that?

Unfortunately, 32 = 8*4, not 16*4

16 is just a clue. You need 8, always half.

72 = 8*3^2 = 8*9 = 72 -- Seems to be working.

Answer 10

okay. thanks

Answer 11

This will be more obvious and motivated when you get to the calculus. For now, just use half for quadratic variation.