Can someone help me im having a hard time

Aline passes through the point (2, -4) and has a slope of 0, what is the equation of the line? plz fast

Which formula finds the probability that a point on the grid below will be in the blue area? p(blue) = total number of squares number of blue squares number of blue squares p(blue) = total number of squares number of blue squares p(blue) = number of white squares

Which of the following is correct interpretation of the expression -4+13