Solve the system of equations by graphing
-1/3x + y = –1
y = 4 + 1/3x

Question

Solve the system of equations by graphing 
-1/3x + y = –1
y = 4 + 1/3x

e.mccormick · Answer

OK?  So what is the part you are having a problem with?

anonymous · Answer

ok so wat u have to do is draw out both lines on the same graph and where they intercept, then u have solved for x and y

anonymous · Answer

attachment

e.mccormick · Answer

Yah, and those are the other options.

e.mccormick · Answer

If they cross at one point, 1 sol.  Same line = infinite sol.  Parallel = no sol.

anonymous · Answer

Okay.. well its not A then

e.mccormick · Answer

Yah, says infinite but they are parallel.  LOL.  So that one was easy to get rid of.  If you graph the lines or check them against those, you will know pretty quick.

anonymous · Answer

wats the difference between A and B ? O.o

e.mccormick · Answer

The name.

anonymous · Answer

lol ok i didnt c the name

e.mccormick · Answer

Same reasoning applies to D.  They are saing infinite but showing no sol.  So that will kill a second choice.  All you need is to see which of the last two the lines actually make.

e.mccormick · Answer

Just a side note: Why are all these lines important?  Well, when you get past calculus, they have a neat class called linear algebra that has t do with just about every science and it uses this stuff heavily.  Just thought I would mention it.