Problem and Variable

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# Problem and Variable - PowerPoint PPT Presentation

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.

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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 packages

Y = 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}

Discrete or continuous
• The data is continuous because it is not a line it is points.
Graph

The total cost

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.