File formats such as scalable vector graphics (SVG), encapsulated postscript (EPS) or Adobe Illustrator (AI) allow graphs to be copyedited and styled to match the rest of the publication. These vector file formats can also be scaled without loss of quality, and will print crisply and clearly.
If these formats are not available, editable PDF, high-quality JPG, TIF or other picture formats may suffice (but are not recommended); otherwise, the graphs may need to be redrawn to be suitable for publication.