1. Generate a line: Click on the New Line button.
• Click on the Move Drawing Pad icon 
if you don't see the line properly 
! Then click anywhere by the line and drag it into a position you want.
2. Choose 2 points on the line. Look for 2 points on the grid. Move the Drawing Pad again if necessary.
• Click on the Point icon. 
• Click on the line. You will get point A on the line.
• Click on the line again. You will get point B on the line.
• Click on Check Points.
3. Find the coordinates of A and B.
• Write these down.
4. Find the slope of the line.
• Find the change in the y-values: Δy = y(B)-y(A).
• Find the change in the x-values: Δx = x(B)-x(A).
• Find the slope: Δy / Δx.
4. Check your answer!
• Type the value of your slope in the box below. You may write it as a fraction a/b or as a decimal rounded to 2 decimal places. Then click on Check Answer.
(If you get a wrong answer and you are sure you are right, use the zoom tool (under the Move Drawing Pad Tool) to make sure your points are on grid points. If not use the move tool (far left) to move the point to a grid point.
• Click on Reset to start over.