Determining Linear Equations

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Dominic

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Jun 16, 2005
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PLease help me with this problem as I have looked for help from my textbook and I just can't comprehend how to do this probelm.


Determine whether this equation is a linear equation and explain. If the equation is linear, identify A, B and C.

Please Help :cry:
 
What equation? Which model with A, B & C are you using?
 
Sorry about that. I was so frustrated with the problem I overlooked writing it. The problem is:

9y = 4x - 18

and the other problem is:


xy=4
 
Using Ax + By = C, where A, B and C are integers, and A is nonnegative?

9y = 4x - 18
<==> 9y - 4x = -18
<==> 4x - 9y = 18

Now can you see A, B, and C?

(1, 4), (2, 2), and (4, 1) are all on xy = 4. Are they on the same line?
 
xy = 4 is an equation. It defines a relation between x and y. What are you supposed to do with it?
 
I'm supposed to determine whether each equation is a linear equation and if so identify A,B, and C.
 
A relation between x and y is linear only if every point (x, y) that satisfies the equation is on the same line. (1, 4), (2, 2) and (4, 1) all satisfy the equation xy = 4. Are those points on the same line?
 
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