Lines can either be by direct contrast or by implication I have tried to show both in this exercise.
The first of the horizontals shows a series of lines formed by the steps, quite simple really.
The first of the verticals is a wind chime, this shows both horizontal and vertical lines but the vertical lines are those that the viewer is drawn to first.
The next image shows a horizontal band of soldiers, although this is not a thin line, given the contrasting background I think this does demonstrate a line.
The next image is a mixture of lines and I am not convinced about the vertical chimney, but I have included it for reflection later on, when hopefully I understand more.
This image was taken from the first batch of this section. It was not required for exercise one but when I saw the view I had to take it, little did I know it would come in handy. The vertical lines of this image show depth and as if it actually leads somewhere, I think being off centre also helps.
This close-up of a guitar has many lines, but the main ones are the three thickest strings which lead vertically up the image, I think this is where the eye is led.
Finally for my last two horizontal lines, I tried to use implied lines, the first is taken at a train station and shows commuters staring at the electronic notice boards seen as a line / band of light. The second was taken underground and shows a very neat line of yellow safety helmets I like this one as an implied line.