A judgement based on the result of an experiment. Part of the experiment used to show that the results of an experiment is really due to the conditions being tested. (The part of the experiment that is not changed.)

A circle graph, or pie graph, is used to show how some fixed quantity is broken down into parts.

independent variable

The independent variable (IV) is the characteristic of a psychology experiment that is manipulated or changed by researchers, not by other variables in the experiment. For example, in an experiment looking at the effects of studying on test scores, studying would be the independent variable.

The part that is changed on purpose is called the independent variable.

The things that are changing in an experiment are called variables. An experiment usually has three kinds of variables: independent, dependent, and controlled. The independent variable is the one that is changed by the scientist.

A control variable (or scientific constant) in scientific experimentation is an experimental element which is constant and unchanged throughout the course of the investigation.

Control setup: The part of the experiment that does not contain the manipulated variable. It may be called the placebo.

A constant is a quantity that does not change. Although you can measure a constant, you either cannot alter it during an experiment or else you choose not to change it. Contrast this with an experimental variable, which is the part of an experiment that is affected by the experiment.

A fixed value. In Algebra, a constant is a number on its own, or sometimes a letter such as a, b or c to stand for a fixed number. Example: in “x + 5 = 9”, 5 and 9 are constants.

A quadratic function is a function of the form f(x) = ax2 +bx+c, where a, b, and c are constants and a = 0. The term ax2 is called the quadratic term (hence the name given to the function), the term bx is called the linear term, and the term c is called the constant term.

Mathematically speaking, a constant function is a function that has the same output value no matter what your input value is. Because of this, a constant function has the form y = b, where b is a constant (a single value that does not change). For example, y = 7 or y = 1,094 are constant functions.

A constant function is a linear function for which the range does not change no matter which member of the domain is used. f(x1)=f(x2) for any x1 and x2 in the domain. With a constant function, for any two points in the interval, a change in x results in a zero change in f(x) .

The constant of proportionality is the ratio between two directly proportional quantities. Two quantities are directly proportional when they increase and decrease at the same rate.