ALGEBRA STAAR REVIEW D1: DOMAIN & RANGE

Front

What is the domain of a function?

Back

The domain of a function is the set of all possible input values (x-values) for which the function is defined.

Front

What does it mean if a function's domain is all real numbers?

Back

It means that any real number can be used as an input for the function.

Front

How do you determine the domain of a function from a graph?

Back

Look for the x-values that the graph covers; any x-value that has a corresponding y-value is included in the domain.

Front

What is the range of a function?

Back

The range of a function is the set of all possible output values (y-values) that the function can produce.

Front

What does it mean if a function's range is y ≥ -4?

Back

It means that the output values of the function are all real numbers greater than or equal to -4.

Front

How do you find the range of a function from a graph?

Back

Look for the y-values that the graph reaches; any y-value that corresponds to an x-value in the domain is included in the range.

Front

What is an inequality?

Back

An inequality is a mathematical statement that compares two expressions, showing that one is greater than, less than, or not equal to the other.

Front

How can inequalities represent the range of a function?

Back

Inequalities can show the limits of the output values of a function, indicating the minimum and maximum values.

Front

What does the notation D:{x > 0} signify?

Back

It signifies that the domain of the function includes all real numbers greater than 0.

Front

What is the significance of the notation D:{all real numbers}?

Back

It indicates that the function can accept any real number as an input.