Function ToolkitDomain, range, notation and the parent functions with their graphs.9th GradeFUNCTION NOTATIONf(x) = 2x + 1 → f(3) = 7f(x) is NOT f times x. It means "the output of f when the input is x".A relation is a function when every input has exactly one output — the vertical line test.DOMAIN & RANGEDomainevery input x is allowed — watch for ÷0 and √(negative).Rangeevery output y the function can actually produce.PARENT FUNCTIONSLinearf(x) = xstraight lineQuadraticf(x) = x²parabola, opens upAbsolute valuef(x) = |x|V shapeSquare rootf(x) = √xhalf a sideways parabolaExponentialf(x) = 2ˣflat then steepCubicf(x) = x³S through the originREADING A GRAPHx-intercepts are the zeros. The y-intercept is f(0).Function Toolkitlearnposters.com
Function Toolkit — printable math wall chart from LearnPosters. Free vector PDF, US Letter and A4.

Questions about the Function Toolkit poster

Who is the Function Toolkit poster for?
Function Toolkit is filed under 9th Grade (ages 14–15), so it matches what that year asks a child to remember. It is equally useful to an older student revisiting math, and to the parent or teacher answering the question at the kitchen table.
When should you use the Function Toolkit poster?
The summary sheet for the function posters in this set. A wall chart earns its place by being glanceable from where the work is happening, so Function Toolkit belongs on the wall where that math work actually happens, within glancing distance, rather than filed away.
What other posters go with Function Toolkit?
Absolute Value Equations, Arithmetic Sequences and Difference of Squares sit alongside Function Toolkit in the 9th Grade set. Printed together they make a wall rather than a single sheet, which is how a reference set actually gets used.Absolute Value EquationsArithmetic SequencesDifference of Squares
Is the Function Toolkit poster free to download and print?
Yes. Function Toolkit downloads as a free PDF with no account, no email and no watermark, like everything else in the 9th Grade set. Print as many copies as you like for a home, a classroom, a library or a tutoring group; reselling the file is the only thing the licence rules out.Read the licence
What size does the Function Toolkit poster print at?
Function Toolkit is a vector PDF laid out for US Letter, and prints on A4 with Fit to page — the same file, no separate download. Because every mark on it is drawn rather than photographed, it stays sharp enlarged to A3, A2 or A1 at a copy shop. Colour carries emphasis only, so a greyscale print of Function Toolkit loses nothing.Printing guide

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Browse every 9th Grade poster, or start from the full catalogue.