Math EquationsMath EquationsMath EquationsMath Equations

By Eron SonsonBy Eron Sonson

Math 5Math 5thth period period

9-24-109-24-10

Real World ProblemReal World Problem

If you go out and buy a If you go out and buy a squirrel for $1,187, how squirrel for $1,187, how much will it cost to buy 245 much will it cost to buy 245 squirrels?squirrels?

VariablesVariables

Equation- 1,187 (245)Equation- 1,187 (245)

Independent- Number of squirrelsIndependent- Number of squirrelsDependent- total costDependent- total cost

Y depends on XY depends on X

The cost of squirrels depends on the The cost of squirrels depends on the number of squirrels I want.number of squirrels I want.

Yes this is a function because x’s Yes this is a function because x’s don’t repeat.don’t repeat.

Domain and RangeDomain and Range

Definitions-Definitions- Domain: all the x valuesDomain: all the x values Range: all the y valuesRange: all the y values

EquationEquation

►D: (1,2,3,4,5,6,7,8,9,10)D: (1,2,3,4,5,6,7,8,9,10)►R: (2,4,6,8,10,12,14,16,18,20)R: (2,4,6,8,10,12,14,16,18,20)► It is a discrete graph because it’s a It is a discrete graph because it’s a

graph of unconnected points.graph of unconnected points.

Function NotationFunction Notation

Equation- y=2(x)+5Equation- y=2(x)+5

Function Notation- f(x)= 2(x)+5Function Notation- f(x)= 2(x)+5

Table

X 2(x)+5 y (x,y)

-2 2(-2)+5 1 (-2,1)

-1 2(-1)+5 3 (-1,3)

0 2(0)+5 5 (0,5)

1 2(1)+5 7 (1,7)

2 2(2)+5 9 (2,9)

Coordinate Grid8

6

4

2

-10 -8 6 -4 -2 2 4 6 8 10

-2

-4

-6 (0,0)

-8

-10