Image source: http://www.pova.com/visitor/cultural_tours/Japanese/images/produce_stand.jpg
The cost of produce or bulk foods at the grocery store is often given in terms
of its weight. The equation c = 2.35p represents the cost, c, of p
pounds of peanuts. The equation c = 37.6p is an equivalent equation because it is the mass
of the peanuts given in ounces.