Question

find and sketch the level curves f(x,y)=c on the same set of coordinates axes for the given values of c. refer to these level curves as a contour map. z=5x-y; c=-2, -1, 0, 1, 2

Answer 1

see below

Explanation:

The five linear equations produce five parallel contour lines. The value of z increases as the lines shift to the right.