Question 230853
If you can convert it to a form of:


ax + by = c


or:


y = mx + b


then it's linear.


x = y is in the form of y = mx + b.


6 = x is already in the form of ax + by = c


It's the same as x = 6.


xy = 5 is probably not linear.


you get y = 5/x which doesn't conform to a linear equation form.


graphs of these equations can be seen by clicking on the following hyperlink.


<a href = "http://theo.x10hosting.com/problems/230853.html" target = "_blank">Picture of graph of equations</a>


y = 5/x is definitely not linear.