12. In the following table,
\( k \) represents number of items sold \( M \) represents profit in dollars a. Complete the following table by hand. Show the substitution of each number into the equation.
b. Create the table using your calculator. Write down what you used for TbIStart and \( \triangle T \) bI. c. Graph the data by plotting the points on paper. Clearly label and scale your axes. d. Graph the equation using your calculator. Write down what you used for your window.