The applet here investigate the possible intersections of two straight lines.[br]Here are two straight lines in the slope intercept form[br][math]y=m_1x+c_1[/math] and [math]y=m_2x+c_2[/math] , where the values of [math]m_1,m_2,c_1[/math] and [math]c_2[/math] can be changed with the slider[br][br]