As part of the United States Census, data is collected on the number of persons in eachhousehold. The census data for four decades are summarized below.(a) In a few sentences describe how theproportion of households with 4people has changed from 1970 to 2000. 
(b) What size of household appears to have decreased the most from 1970 to 2000?
Definitions:
Synapse
A synapse is the junction between two neurons, facilitating the transmission of electrical or chemical signals from one neuron to another.
Chemicals
Substances composed of atoms or molecules, used in or produced by chemical processes.
Synapses
The junctions through which neurons communicate with other neurons, muscle cells, or glands, using chemical or electrical signals.
Parkinson's Disease
A progressive neurological disorder characterized by tremors, stiffness, and slow movement, caused by the degeneration of dopamine-producing neurons.
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