Three math problems 1) If the area of the triangle formed by the line y = 3x + m and the two coordinate axes is 6, try to find the value of M 2) Given the line y = (1 / 2) x + (K-6 / 2) and the line y = (- 1 / 3) x + (4K + 1 / 3), if their intersection is in the fourth quadrant, find the value range of K. (Note: the one in brackets represents a fraction, / is the fractional line, the numerator on the left, and the denominator on the right) 3) The intersection points of the line y = (5 / 4) x + B and X axis, Y axis are a and B respectively, and pass through the points (- 1, - 25). Find the number of points on the line AB (including a and B points), whose abscissa and ordinate are integers. (Note: the one in brackets represents a fraction, / is the fractional line, the numerator on the left, and the denominator on the right.)

Three math problems 1) If the area of the triangle formed by the line y = 3x + m and the two coordinate axes is 6, try to find the value of M 2) Given the line y = (1 / 2) x + (K-6 / 2) and the line y = (- 1 / 3) x + (4K + 1 / 3), if their intersection is in the fourth quadrant, find the value range of K. (Note: the one in brackets represents a fraction, / is the fractional line, the numerator on the left, and the denominator on the right) 3) The intersection points of the line y = (5 / 4) x + B and X axis, Y axis are a and B respectively, and pass through the points (- 1, - 25). Find the number of points on the line AB (including a and B points), whose abscissa and ordinate are integers. (Note: the one in brackets represents a fraction, / is the fractional line, the numerator on the left, and the denominator on the right.)

1 / 2 * (M / 3) * m = 6, M = ± 6
2. Simultaneous y = (1 / 2) x + (K-6) / 2, y = (- 1 / 3) x + (4K + 1) / 3, x = K + 4, y = k-1