Find the solution to the following system of equations:
y = -x + 2
y = x + 1
First try it using the method of substitution then ... using the applet below
set the slope of the red line to m1 = -1 and its y-intercept to b1 = 2 and
set the slope of the blue line to m2 = 1 and its y-intercept to b2 = 1, then
read the coordinates of the Point of intersection.
(Use your mouse to drag a labeled point and change its value).