By: Jared Martin 6 th period. Real world problem Josh got $155.75 for his birthday, and he bought x...
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Transcript of By: Jared Martin 6 th period. Real world problem Josh got $155.75 for his birthday, and he bought x...
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