Answer
The contour maps of $g\left( {x,y} \right) = 2x$ have larger slope than the contour maps of $f\left( {x,y} \right) = x$.
Work Step by Step
From Exercise 4, we obtain the contour map of $f\left( {x,y} \right) = x$ consists of lines with equation $z=x=c$ for $c = \left( {..., - 2, - 1,0,1,2,...} \right)$, corresponding to the contour interval $1$.
Similarly, the contour map of $g\left( {x,y} \right) = 2x$ consists of lines with equation $z=2x=c$ for $c = \left( {..., - 2, - 1,0,1,2,...} \right)$, corresponding to the contour interval $1$.
Thus, the contour maps of $g\left( {x,y} \right) = 2x$ have larger slope than the contour maps of $f\left( {x,y} \right) = x$.
