Review Topics for Quizizz

• ​Identifying a Function

• ​ Domain and Range

• ​ Function Values and Function Tables

Identifying a Function

All functions allow for each INPUT TO ONLY HAVE ONE OUTPUT.​

• When it comes to TABLES, POINTS, MAPPING DIAGRAMS: As long as the x-value does NOT REPEAT, we tend to have a function.

• ​When it comes to GRAPHS, the graphs HAVE TO PASS THE VERTICAL LINE TEST. Our vertical line can only touch the graph ONCE for the graph to be a function.

FUNCTION. NOT FUNCTION FUNCTION NOT FUNCTION

Domain & Range

Functions have INPUTS and OUTPUTS.

• We can call INPUTS, x-values, and INDEPENDENT VARIABLES.​

• We can call OUTPUTS, y -values, and DEPENDENT VARIABLES.

• DOMAIN: Has ALL the INPUTS of a function.

• RANGE: Has ALL the OUTPUTS of a function.​

EXAMPLE:

Domain: { 1,2,3,4 }

Range: {2,4,6,8}​

​Sneak peak of this week:

Domain: All numbers from 0 to 4.

Range: All numbers from 0 ​to 4.

Function Values/Tables

​We can represent functions with equations.

EXAMPLE: f(x) = x + 2 is a function that adds 2 to every input. If we need to find f(1), then f(1) = 1 + 2 = 3

​

EXAMPLE: f(x) = 3x -2 is a function that multiplies 3 to every input then subtracts by 2.

If ​we need to f(2) then, f(2) = 3(2) - 2 = 6 - 2 = 4.

​

We can organize function values with function tables!​

The End :)

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