What the is common denominator for 1/9 and 5/12

How do i do this activity, is appreciated

Lindsay used two points, (x,y; ) and (+2.82), to find the equation of the line, y = mx + b, that passes through the points. y2-y, first, she used the definition of slope and determined that the value of mis x, - . given this information, which expression must represent the value of b?

If sec theta = 5/3 and the terminal point determined by theta is in quadrant 4, then