Whenever you see 2 numbers between a “(” and a “)”, such as “(3,5)” go to the grid where the big lines cross and count lines to the right until you reach 3. Then count lines going up until you reach the 5th line. Now click the mouse where these two lines cross. Do this until you see the colored picture.
Congratulations! You have performed a very useful mathematical operation. You have plotted points. You are preparing for calculus.