"along a line" is correct and usable in written English.
You can use it to describe a direction of movement, such as "We walked along a line towards the end of the beach."
Start with an L and an S side by side along a line.
The other three stable points are located along a line passing through the Sun and Jupiter.
"They're cutouts that the kids blow along a line, using their breath," Ms. Waxman said.
Much like tightrope-walking, slacklining involves balancing along a line between two fixed points.
The shelf's mean ice thickness is about 1,100 feet (330 m) along a line at about 79° S latitude.
The life paths of all good artists can be traced back along a line that, retrospectively, seems inevitable.
Now there aren't any along a line stretching from the Florida Panhandle to the Great Lakes, either.
Photo: An English soccer supporter walking along a line of riot police in Frankfurt during a clash with German fans.
Not quite a movement, it is more a pyramid of complaint ranged along a line from dissent to discontent.
"The whole point of Top Gear is that it walks along a line, that's one of the pleasures of it.
The customers are evenly distributed along a line.
