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so, where are they?
you said, "graph THE system of equations", which one?
this y=3x-9 and y=-1/3x+3
they are orthogonal lines, so how many times do they cross?
orthogonal = perpendicular
? i don't get how do graph them
pick any two points for each, and plot that
do you know how to find the y intercept and the x intercept?
that is what i have to choose from a.) The system has one solution. b.) There are no solutions to the system. c.) There are an infinite number of solutions
I am really bad at math
so, just pick any two points for one, plot them on the cartesian plane, do the same for the other, they're both a line, so, all you need is 2 points for each
so the right one would be A i think
the right one... as opposed to the left one? did you graph them?
yes but i don't get it i think i did it wrong
I mean a.) The system has one solution.
well, when you have 2 functions, and "x" and "y" in both usually means, that the "x" and "y" above and below have the same value, or are the same if x = 3 above x= 3 below too a "solution" graphically occurrs, when "x" and "y" have the same value or are the same for both graphics/lines, that is, WHERE they intersect, at that point, "x" and "y" are the same for both so, take a peek at your plotted graph, do they touch each other? more than once? not at all?
I think they touch once
where? at what coordinates? (x,y)
and what's the value of "x" there?
meaning you haven't done the plotting :/ try plotting them here -> http://www.fooplot.com/
see if they intersect, once, more than once, not at all
i don't know how to plot the Y=3x-9 y=-1/3x+3
you give a value to "x", say 10, so y will be = 3(10)-9 = 30-9 = 21
"x" is INDEPENDENT to get any value pretty much, "y" is DEPENDENT on whatever "x" gets for its value
i still don't think i am doing it right on the fooplot
at fooplot all you do is, type it in
the whole thing
they touch almost on 2
and they only touch once
thank you :)