Relations and Functions
Updated: 9/10/2020
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#### Storyboard Text

• Can you tell me about relations and functions?
• Sure! A relation is a group of number pairs and a function is a relation where there is exactly one output value for every input value.
• How are they alike and different?
• Well, a function can only have exactly 1 output unlike a relation that could have many values for a single input. They are alike because a function is also a relation. Click To EditHelpEscapeInsert ParagraphUndo the last commandRedo the last commandTabUntabSet a bold styleSet a italic styleSet a underline styleSet a strikethrough styleClean a styleSet left alignSet center alignSet right alignSet full alignToggle unordered listToggle ordered listOutdent on current paragraphIndent on current paragraphChange current block's format as a paragraph(P tag)Change current block's format as H1Change current block's format as H2Change current block's format as H3Change current block's format as H4Change current block's format as H5Change current block's format as H6Insert horizontal ruleShow Link DialogSummernote 0.8.18 · Project · Issues
• Do you have an example?
• ✅ {(3,5) (1,-2) (7,9) (10,10)}❌ {(-3,6) (0,2) (3,-9) (0,-5)}✅ {(2,4) (-4,7) (3,9) (1,8)}
• So, a domain is all input values for a relation, right?
• {(2, 5) (3, 8) (-4, 2) (6, 9)}Domain: {2, 3, -4, 6}Range: {5, 8, 2, 9}
• Yes, and the range is all output values.
• What is function notation?
• f(x) = 3x + 1 f(3) = 3(3) + 1f(3) = 9 + 1f(3) = 10﻿﻿
• That is how you write out a function. f(x) = 3x + 1
• Here’s 3 ways to show a relation.