IXL - Domain and range of quadratic functions: equations (Algebra 1 practice)

What is the range of this quadratic function?

–

{

≥

}

{

≥

–

}

{

≤

–

}

all real numbers

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Learn with an example

question

What is the domain of this quadratic function?

–

{

≥

}

{

≤

}

{

≥

}

all real numbers

key idea

The domain of a function is the set of all

x-values

that can be inputs of the function.

solution

Every

x-value

is a valid input for a quadratic function. No matter what value you choose for

you can plug that value into the equation and solve for

So, the domain is the set of all real numbers.

Looking for more? Try these:

Lesson: Quadratic functions

Lesson: Completing the square

Lesson: Factoring quadratic equations

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Teacher tools

Work it out

Not feeling ready yet? These can help:

Y.9Domain and range of quadratic functions: graphs

Y.6Write a quadratic function in vertex form

X.6Factor quadratics with other leading coefficients

G.2Set-builder notation

Lesson: Quadratic functions

Lesson: Completing the square

Lesson: Factoring quadratic equations

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