Topic explanation

Standard explanation

A function assigns exactly one output to each input in its domain. Domain contains allowed inputs; range contains attained outputs.

Key points

• Functions, domain, and range
• rule
• worked example
• Functions, domain, and range: A function assigns exactly one output to each input in its domain. Domain contains allowed inputs; r
• CONCEPT AND RULE: A function assigns exactly one output to each input in its domain. Domain contains allowed inputs; r
• METHOD: For functions, domain, and range, identify the given information and required result. Select the mat
• A function assigns exactly one output to each input in its domain. Domain contains allowed inputs; range contains attained outputs.
• Worked pattern: For f(x)=sqrt(x-2), domain is x>=2 and range is y>=0.

Labelled diagram