text: math extra credit? consider the line "l" containing the points (-3, 8),and (6, -4). what is the length of the hypotenuse of the right triangle fromed by the intersection of line "l" and the x and y axes? first find the slope (or gradient) of line "l" = (8-(-4))/(-3-6) =-12/9 =-4/3  next find the equation of line "l" y=(-4)/3x+c 8=-4/3(-3)+c... c=4 (which is y-intercept) line "l": y=(-4/3)x+4  0=(-4/3)x+4, x-intercept is 3  the length of the hypotenuse = 5 ('cos 3^2+4^2=5^2)