Posted by Cassidy on Friday, June 5, 2009 at 9:32am.
First show that this is a quadratic relationship by taking differences and second differences:
y dy d2y
3 10 8
13 18 8
31 26 8
57 34 8
91 42 8
If the second difference is constant, it is a quadratic relationship.
Assume the quadratic model as:
f(x)=ax2 + bx + c
Thus, the second difference = 2a
By substituting values of x and a into one of the formulas, b can be found
Substitute a and b in f(1), we get
Econometric -SAS - I am having trouble figuring out the correct code. I am ...
Math (surveying) - I am having a really hard time figuring this problem out. I ...
Algebra II - what is the equation for the line that passes through the point (3,...
math - I am having a hard time figuring out the distane between two points the ...
choice - Explain how healthy behaviors and choices can positively effect your ...
accounting - I am having a hard time of figuring this out can you please help me...
accounting - I am having a hard time of figuring this out can you please help ...
algebra - At the first tri-city meeting, there are 8 people from town A, 7 ...
Finance - I am having a hard time figuring out the equation that I should be ...
Algebra - Im having a hard time figuring out this problem: Use the function, y...
For Further Reading