Can yall help me with this question?

Graph the equationy=x^2 -[tex]y = x^{2} - 2[/tex]

Identify all the cases where non-probability sampling is used when attempting to study the characteristics of a large city. studies on every subject in the population divide a population in groups and obtain a sample studies with a limited amount of time demonstrate existing traits in a population studies with the nth person selected

If wxyz is a square, which statements must be true? plz < 3