For a scientific explanation to be testable, it must also be conscious and unconscious experimental and provable perceivable and measurable hypothesized and theoretical

Perceivable and measurable

Explanation: For a scientific explanation to be testable it must be Perceived and measured.

Perceivable describes a person's view of a certain situations or scientific explanation, perception helps to test a scientific explanation through different views.

Measurability- for a scientific explanation to be testable,it must be measurable,it must be quantified in terms of numbers. The measurability of a scientific explanation gives credibility to the scientific explanation and helps its acceptance.

changes in factors like average income and preferences can cause an entire demand curve to shift right or left. this causes a higher or lower quantity to be demanded at a given price. demand curves relate the prices and quantities demanded assuming no other factors change. it is important for consumers to know this information, because it is crucial for them to know what they can afford and can't afford. i hope this .