Register to reply 
Determine whether the equation represents y as a function of x 
Share this thread: 
#1
Oct709, 10:56 PM

P: 7

1. X^2 + y = 8
2. Relevant equations 3. my steps: y = 8  x^2 x^2 = 8  y (8y) + y = 8 Not a function. My logic is, because the equation does not equal y, it is not a function Please show me step by step the right answer, and preferably the reason why. 


#2
Oct709, 11:12 PM

Sci Advisor
HW Helper
Thanks
P: 25,235

You already had it in the first step. And it just gets crazy after that. If you don't know why, I think you should look up the definition of 'function' and tell us what it is.



#3
Oct709, 11:20 PM

P: 7

Oh. It's not a function because y = x^2 + 8 ?



#4
Oct709, 11:28 PM

P: 7

Determine whether the equation represents y as a function of x
Please assist me in my retardation. :( It is immensely painful.



#5
Oct709, 11:28 PM

Sci Advisor
HW Helper
Thanks
P: 25,235




#6
Oct809, 12:26 AM

Mentor
P: 21,397




Register to reply 
Related Discussions  
Determine pdf of function with gamma pdf  Calculus & Beyond Homework  0  
Determine a function that calculates the nth weight factor of a wave function  Advanced Physics Homework  0  
Determine the function so that the integral holds  Calculus & Beyond Homework  6  
How to determine when a function changes sign?  General Math  1  
Equation that represents the force?  Introductory Physics Homework  13 