The line y=kx +4y=kx+4y, equals, k, x, plus, 4, where kkk is a constant, is graphed in the xyxyx, y-plane. If the line contains the point (c, d)(c, d)left parenthesis, c, comma, d, right parenthesis, where c \neq 0c  =0c, does not equal, 0 and d \neq 0d  =0d, does not equal, 0, what is the slope of the line in terms of ccc and ddd?.