Which of the following statements must be true in order for the line represented by the equation y = mx + b to have a negative x-intercept? the signs of the values of  m  and  b  are the same. the value of  m  is positive while the value of  b  is negative. the value of  m  is negative while the value of  b  is positive. the signs of the values of  m  and  b  do not affect the sign of the  x-intercept.