Find the value of each variable.

x=38, y=76

x=52, y=76

x=38, y=104

x=52, y=104

2x=76 since oposite angles are equal
2x=76
divide 2
x=38

on line, angles add to 180
2x+y=180
76+y=180
minus 76 both sides
y=104

y=104
x=38

3rd option

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)