What is a variable
1 like339 views
Variables are symbols used to represent unknown values in mathematics. Common variables use letters like x, y, z, except for i which represents imaginary numbers and e which represents Euler's constant. If the unknown refers to a specific person, place or object, the first letter of the name is typically used as the variable, otherwise an arbitrary letter is chosen. Examples show variables like a for John's age, h for Mary's height, s for strawberries.
1 of 5
Download to read offline
What is a variable
- 1. Variable Definition ● A number or a symbol used to represent an unknown value ● Use letters of the alphabet such as x, y, z ● The letter i is reserved for an imaginary number, so we don’t use i as a variable ● The letter e is also reserved for Euler’s constant 1
- 2. Variable Tips for a known object or thing or person ● If a person, place, object is know, then we use the first letter of the person, place, or object for the variable ● Otherwise, we must pick an arbitrary variable 2
- 3. Variable Examples for Person, place, or thing 3 Example Variable John’s age a Mary’s height h strawberries s eggs e cars c dimes d
- 4. Variable Examples for unknown things 4 Example Variable A number x An unknown number x Some number x A number and another different number x, y