solve each system by graphing and tell whether it is consistent or inconsistent if the system is consistent tell whether it is dependent or independent.

Question

anonymous · Answer

x-y = 6
5x-5y=30

anonymous · Answer

Do you agree that these two lines have the same graph?

anonymous · Answer

look at both lines carefully... do you see anything peculiar?

anonymous · Answer

don't need to graph, look at the equations...

anonymous · Answer

I didnt say you had to, but it's easier to say that than "do you think these two lines have the same equation"

anonymous · Answer

yes

anonymous · Answer

When two lines have the same graph they are consistent and dependent

anonymous · Answer

well it says on here to graph them so can you help me do that

anonymous · Answer

Consistent = At least one solution (intersection of the two lines)
Dependent = Same graph
Inconsistent = No solutions, they never touch and therefore are parallel
Independent = 1 solution, two different lines

phi · Answer

When you have time, this video does a good job explaining how to graph a line http://www.khanacademy.org/math/algebra/linear-equations-and-inequalitie/v/graphs-using-slope-intercept-form and here is a 2 minute video that shows plotting just one point http://www.khanacademy.org/math/algebra/linear-equations-and-inequalitie/v/plot-ordered-pairs