By: Jared Martin 6th period

Real world problem

Josh got $155.75 for his birthday, and he bought x pair of shoes with it.

Equation

Y= 155.75-25x

Independent and dependent variables The change depends on the amount

of money spent.

Is it a function? Why?

Yes, because it passes the vertical line test, and the x value doesn’t repeat.

Definition for domain and range. Domain- the set of possible input

values of a relation or function. ( 1,2,3,4,5)

Range- the set of output values of a function or relation. ( 130.75, 105.75, 80.75, 55.75, 30.75)

Is the domain continuous or discrete? Why? Discrete, because you cant buy a

half a pair of shoes.

Equation stated and function notation Y= 155.75-25x F(x)= 155.75-25x

Table

x Y=155.75-25x y (x,y)

1 Y=155.75-25(1) 130.75 (1,130.75)

2 Y=155.75-25(2) 105.75 (2,105.75)

3 Y=155.75-25(3) 80.75 (3,80.75)

4 Y=155.75-25(4) 55.75 (4,55.75)

5 Y=155.75-25(5) 30.75 (5,30.75)

Graph