Chap 12 Review

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Exercise 1 In the polynomial $a_0+a_{x}x+a_{y}y+a_{xy}xy$, what is the term $a_{xy}xy$ called?

Interaction term       Quadratic term       Linear term       Constant term      

question id: drill-Polynomials-1

Exercise 2 In the polynomial $a_0+a_{x}x+a_{y}y+a_{xx}xx$, what is the coefficient on the interaction term?

0       $a_{xy}$       $a_{xx}$       $a_0$      

question id: drill-Polynomials-2

Exercise 3 Imagine a second-order polynomial in three inputs: $x$, $y$, and $z$, like this: $$b_0+b_{x}x+b_{y}y+b_{z}z+b_{xy}xy+b_{xz}xz+b_{xx}{x}^2+b_{yy}{y}^2+b_{z}z{z}^2.$$ All of the possible second-order (or less) terms are shown, except for one. Which term is missing?

the interaction between $y$ and $z$

the quadratic term in $z$

the linear term in $y$

the constant term

question id: drill-Polynomials-3

12-review.rmarkdown

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