Question 169629
we have to figure out if the problems down below are linear or non- linear equations, and then have to give an explanation. can you help me ? 
2x=3y+1
4xy+2y=7
2x(squared)=4y-3
x/5-4y/3=2
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If they're linear, their graphs will be a straight line, possibly the source of the term linear.
Linear eqns are of "order 1", meaning the exponents are 1.  The 3rd eqn has an x^2 term, so it's not linear.  The other 3 are linear.