Iagrams
the intersection of plane , and plane s will be
the intersection of lines n and k is
point x is the intersection of

If i think this is what your asking, he should look at the grams or pounds/ounces and compare the to their cost then max can identify which one is proportional and which is not ( i think xd)

The solution of the system of linear equations is b. (2,-3) because the solution is the poi (point of intersection)