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What are four different ways of representing functions? How can you tell if a relationship is a function?

 Mar 15, 2016

Best Answer 

 #1
avatar+129852 
+5

I'm not sure about the first part....but....for the second....as long as each different value of the independent variable - usually denoted as x - produces only one value for the dependent variable - usually denoted as y - we have a function.....this passes what is known as the "vertical line" test

 

Example:

 

y = x^2    is a function because each value of x only produces only one y

 

But.....

 

x = y^2   is not .......note  y = -2 and y = 2 produce the same x.......thus, one value of x - namely, 4 - is associated with two different y values........

 

 

 

cool cool cool

 Mar 15, 2016
 #1
avatar+129852 
+5
Best Answer

I'm not sure about the first part....but....for the second....as long as each different value of the independent variable - usually denoted as x - produces only one value for the dependent variable - usually denoted as y - we have a function.....this passes what is known as the "vertical line" test

 

Example:

 

y = x^2    is a function because each value of x only produces only one y

 

But.....

 

x = y^2   is not .......note  y = -2 and y = 2 produce the same x.......thus, one value of x - namely, 4 - is associated with two different y values........

 

 

 

cool cool cool

CPhill Mar 15, 2016
 #3
avatar+72 
0

thx

gmitc1416  Mar 15, 2016
 #2
avatar+72 
0

**JUST SO YALL KNOW**

THIS IS EIGHTH GRADE MATH!!

 Mar 15, 2016
 #4
avatar+129852 
0

Well.....since most of us only function at a 4th grade level......we're probably over our heads, here......

 

 

 

 

cool cool cool

 Mar 15, 2016
 #5
avatar+72 
0

ure in 4th grade

gmitc1416  Mar 15, 2016
 #6
avatar+1491 
+4

No gmitc1416... what CP means is that the average adult only uses his/her thinking capacity at a fourth grade level, this is why you gotta go to school and use this knowledge to your advantage. WE MUST BECOME THE DIFFERENCE! Anyways I'm hopeless in this segment of math so I have no input towards to the question.

HighSchoolCalculus  Mar 15, 2016

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