Using your calculator, open the screen so that both graphs are being displayed on one single graph. Then press STAT (should be located directly under your screen). Go down until you see an option called INTERSECT. It will then go back to your graphing screen and ask you "left bound?" go slightly to the left on one of your graphs (prior to doing this make sure your cursor is on a graph) and press enter. Then it will ask you "right bound?", do the same by goign slightly to the right. press enter. then press enter once more, and it will give you your coordinates.
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y=f(x) and y =g(x) are two linear equation of x. the intersection of their graphs will tel the solution of the equation f(x)=g(x).
The graphs of the two equations have only one intersection point.
Connect the two points.
intersection.
In analytical geometry, you equate the equations of the two planes and simplify.