Answer:
a. EDUCFUNDS is a categorical variable, specifically an ordinal variable, as it measures levels of agreement on a scale.
b. One sociodemographic variable that may affect U.S. adults' views on the adequacy of current levels of funding for public education in the U.S. is income. Responses could be recorded as a range of income levels (e.g., less than $25,000, $25,000-$50,000, $50,000-$75,000, etc.) or as a continuous variable.
c. Hypothesis: U.S. adults with higher incomes will be more likely to agree or strongly agree that current levels of funding for public education in the U.S. are adequate compared to those with lower incomes.