What is the rate in which the second quantity is one unit

When grades are expressed as a quantity of 1, such as two feet per second or 5 miles per hour, they are called unit rates.

M< 5 = 80 , < 2 = 80, < 6= 100, < 3= 100, < 7= 80, < 4= 80, < 8= 100

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)