Question

The amount of toothpaste in a tube decreases each time you brush your teeth. Identify the independent and dependent variables in this relationship.

A) Independent variable: The amount of toothpaste used; Dependent variable: The number of times you brush your teeth.
B) Independent variable: The number of times you brush your teeth; Dependent variable: The amount of toothpaste used.
C) Independent variable: The brand of toothpaste; Dependent variable: The number of times you brush your teeth.
D) Independent variable: The temperature of the toothpaste; Dependent variable: The amount of toothpaste used.

Answer 1

The correct answer is Option B: The independent variable is 'The number of times you brush your teeth,' and the dependent variable is 'The amount of toothpaste used.'

Step-by-step explanation:

In the relationship between the amount of toothpaste in a tube and the number of times teeth are brushed, the independent variable is the factor that you manipulate or change, while the dependent variable is the one that is affected by the change in the independent variable. Here, the correct answer would be Option B, meaning the independent variable would be 'The number of times you brush your teeth,' since this is what you decide to change. It is not determined by other factors in our everyday life situation. Then the dependent variable would be 'The amount of toothpaste used,' as it changes in response to how often teeth are brushed. In research, increasing reliability involves using accurate tools and methods to ensure that results are replicable, similar to how using a measuring cup in cooking ensures consistent results.