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Problem and Variable. By: Libby Northam Mrs.Klar-7 9-20-10. Problem:. Margret and Monica went to the store to buy brownies. The brownies cost $10 each package, they bought 2 packages. Equation:. X = Number of packages Y = The total cost Y=10x or f(x)=10x. Independent and Dependent. - PowerPoint PPT Presentation
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Problem and Variable
By: Libby NorthamMrs.Klar-7
9-20-10
Problem:• Margret and Monica went to the
store to buy brownies. The brownies cost $10 each package, they bought 2 packages.
Equation:
X = Number of packagesY = The total cost
Y=10x or f(x)=10x
Independent and Dependent
• Independent- number of packages
• Dependent- the total cost
We know that Y depends on X. So the total cost depends on the number of
packages.
Function or not
• The data is a function because no “X” values repeat.
Domain and Range
• Domain- all the “X” values in the data• Range- all the “Y” values in the data
D:{1,2,3,4,5}R:{10,20,30,40,50}
Graph X 10x Y (X,Y)
1 10(1) 10 (1,10)2 10(2) 20 (2,20)3 10(3) 30 (3,30)4 10(4) 40 (4,40)5 10(5) 50 (5,50)
Discrete or continuous
• The data is continuous because it is not a line it is points.
Graph
0.5 1 1.5 2 2.5 3 3.5 4 4.5 5 5.50
10
20
30
40
50
60
Column2
Number of Packages
The
tota
l cos
t
Soooo…
• The total cost is depending on the number of packages that Margret and Monica buy $10 a pack. If the buy 2 packages than the spend $20.
Thank you for watching!