Question

how should you test a hypothesis? by writing a mathematical equation by making a single observation by performing a controlled experiment by answering a series of questions

Explanation:

In the scientific method, a hypothesis is tested by performing a controlled experiment. This allows for isolating variables and determining cause - and - effect relationships. Answering questions is more for surveys, a single observation may not be conclusive, and writing a mathematical equation is not the typical way to test a hypothesis.

Answer:

by performing a controlled experiment