Alissia’s Function Slide Show!!

Real- World Problem

• Faith and 3 of her friends wants to go to the movies, if the tickets cost $7.50 each plus popcorn which cost 3.50 each not including tax, how much will cost for them to go?

Equation

• The equation to my problem is… y= 11.00x or

J(x)=11.00x

y=The total cost of the tickets and popcorn

X= The number of people

X= independent , y=dependent

• The independent variable is x which is the number of people.

• The dependent variable is y which is the total cost of the tickets and popcorn.

We know y depends on x So the total cost depends on the number of people.

Is This a Function? & Why?

• yes, because the x’s do not repeat.

Domain & Range!

• The domain of a relationship is the set of permissible x values. Domains can be continuous or discrete.

• The range of the relationship is the set of permissible y values.

My domains are [1,2,3,4] & My ranges are [11.00, 22.00, 33.00, 44.00]

Continuous Or Discrete

• Discrete. Why? Because there are number

between 11.00- 44.00!

Function Notation

• Equation: y= 11x• Function Notation: F(x)= 11x

Table of Values

0.5 1 1.5 2 2.5 3 3.5 4 4.505

101520253035404550

Y-Values

Y-Values

The Answer!

• Sooooooo… The total cost of Faith and her 3 friends for the tickets and popcorn is $44.00 Dollars!