What determines how many representatives a state may send to the house of representatives

by population!! Under Article I, Section 2 of the Constitution, seats in the House of Representatives are apportioned among the states by population, as determined by the census conducted every ten years. Each state is entitled to at least one Representative, however small its population.

the difference is that white collar worker performs skills like worker as a scientist or well blue collars do physical work and they do services like being a cook.