1. What is the slope of the line passing through (-1,2) and (3, 14)?  
2. What is the equation of line passing through (-2, -3) with slope -2?  
3. What are f(g(1)) and g(f(1)) if f(x) = 3x -2 and g(x) = 2/(x^2+1) ?  
4. What is the domain of the function f(x) = 1/(2x-3) ?