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Formula Sheet

Functions — Formula Sheet

XAT · Quantitative Ability & Data Interpretation

Free Functions formula sheet for XAT Quantitative Ability & Data Interpretation 2026 — all important formulas, equations, and constants for quick reference.

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An illustration defining a function as a rule mapping an independent variable (x) from a domain (D) to a dependent variable (y) in a range (R), using a simple example like y=f(x).
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Formula Sheet — Functions

Important formulas and equations from Functions for XAT Quantitative Ability & Data Interpretation.

Formulas — Functions

Function Basics

y = f(x)
Domain: Set D where f(x) is defined
Range: Set of all possible y values

Even and Odd Functions

Even: f(x) = f(-x)
Odd: f(x) = -f(-x)

Graph Transformations

y = f(x) + c
y = f(x + c)
y = -f(x)
y = f(-x)

Inverse Functions

f⁻¹(f(x)) = x
Domain of f = Range of f⁻¹

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Frequently Asked Questions

What topics are covered in Functions for XAT?
Functions is an important chapter in XAT Quantitative Ability & Data Interpretation. It covers key concepts and formulas that are frequently tested in the exam. Key topics include: Introduction to Functions, Methods of Representing Functions, Even and Odd Functions, Inverse Functions.
How important is Functions for XAT?
Functions is a frequently tested chapter in XAT Quantitative Ability & Data Interpretation. Questions from this chapter appear regularly in previous year papers. There are 52 practice questions available for this chapter.
How to prepare Functions for XAT?
Start by understanding the core concepts, then solve practice questions. Focus on formulas and their applications. Use revision notes for quick review before the exam.

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