adjective describes a noun or pronoun, in this case indicating the position or alignment of something
preposition shows the relationship between a noun (or pronoun) and other words in a sentence, in this case indicating position or location
Points lying in line on a graph
In line for software updates
In line with company policies and procedures
In line with the message being conveyed
In line for boarding
In line with the publisher's editorial guidelines, the writer submitted a revised draft of the article.
The psychologist's research findings were in line with previous studies in the field.
The project manager ensured that all team members were in line with the project timeline and objectives.
The financial analyst's recommendations were in line with the company's long-term financial goals.
The marketing director developed a campaign that was in line with the company's brand image.