Graph the line y = - .5x + 2 with the window ZDecimal. Without pressing TRACE, move

Question:

Graph the line y = - .5x + 2 with the window ZDecimal. Without pressing TRACE, move the cursor to a point on the line. Then move the cursor one unit to the right and down .5 unit to return to the line. If you start at a point on the line and move 2 units to the right, how many units down will you have to move the cursor to return to the line? Test your answer.