There are a number of species of sweet potato (Ipomoea batatas), they are fairly low growing plants and can actually be used as a ground cover in landscaping. They seldom get taller than 30 - 40 cm high.
Neither. A potato is a plant with the potato in the ground under a green top.
Ultimately, that would depend on the plant one is averaging. Plants come in all kinds of various shapes and sizes / heights.
CAn you eat a decrative potato plants potato?
Yes the potato is an angiosperm
The Disaccharide Sucrose found in a potato plant is in the flesh of the potato. The potato is nearly 100% starch and carbohydrates that produce sugars in the body.
potato
The part of the potato plant we eat is called the tuber, which is actually an enlarged underground stem.
Why
I am assuming you are talking about the potato plant as a whole and not just the stem of the plant, which is what is known as a "potato." So continuing with the assumption that you are talking about a potato plant, then yes a potato plant is a multicellular organism. It is an organism and it has more than one cell that work together for the good of the group of cells.
carper grass, mimosa, sweet potato plant
A potato
It is a common misconception that potatoes are roots. They are actually tubers, and thus potatoes are a part of the potato plant. They are not the roots of any plant.