AlgebraLibrary   "Algebra" 
Algebra functions.
 line_fromXy(x1, y1, x2, y2) 
  Get line slope and y-intercept from coordinates
  Parameters:
     x1 : x coordinate 1 (int - bar index)
     y1 : y coordinate 1 (float - price/value)
     x2 : x coordinate 2 (int - bar index)
     y2 : y coordinate 2 (float - price/value)
  Returns:   of line
 line_getPrice(x, slope, yInt) 
  Get line slope and y-intercept from coordinates
  Parameters:
     x : x coordinate to solve for y (int - bar index)
     slope : slope of line (float)
     yInt : y-intercept of line (float)
  Returns: y (price/value)
