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  Trying to get a program to fine the slope and intercept of a line on a graph....
  I've got it all working so far...except the last line. I broke it down into pieces and ran it assigning numbers to the variables, but in the program, it doesn't work. Here is the code...
  def slope(x1, y1, x2, y2): a = (float(y2 - y1)) b = (float(x2 - x1)) m = float(a / b) def intercept(x1, y1, x2, y2): x = x1 y = y1 m = slope(x1, y1, x2, y2) b = y - m*x return b
  It keeps giving me this error
  Traceback (most recent call last): File "<pyshell#4>", line 1, in <module> intercept(12, 20, 24, 40) File "C:\Users\Tony\Documents\Module 2 SLP\slope", line 11, in intercept b = y - m*x TypeError: unsupported operand type(s) for *: 'NoneType' and 'int'
  If I'm understanding this correctly, it's telling me the * is an unsupported operand...but I thought * was an operator?
  I tried
  b = y - (m*x)
  and that didn't work either....any hints?