SAT Math Advanced Math

Function Notation

Evaluate f(x), f(a+1), f(2x), and f(f(x)) with step-by-step substitution. Supports linear, quadratic, and rational functions.

f(x), f(a+1), f(f(x))

All function types

Graph with points marked

Live

Define f(x)

Function Type

m (slope)

b (intercept)

a (num coeff)

b (num const)

c (den coeff)

d (den const)

x₁ (evaluate)

x₂ (for f(f(x₂)))

Result

f(x₁)

Enter function and press Evaluate

Step-by-Step Substitution

Function Graph

Put It Into Practice

The calculator shows the steps — a quiz proves you can do them on your own.

SAT tutoring drills f(a+1) and composite function evaluation until substitution is completely automatic on test day.