If you plot these graphs they may look the same, but are they?
I took the graph y=4x+7 and performed four transformations. Can you find the order in which I could have carried out the transformations?
Position the lines so that they are perpendicular to each other. What can you say about the equations of perpendicular lines?
Is there a relationship between the coordinates of the endpoints of a line and the number of grid squares it crosses?