Perceptual Puzzle #24- Connect The Dots -

The image below shows 7 dots evenly distributed along the circumference of an imaginary circle with an 8th dot at the center. What is the fewest number of straight lines required to connect (go through) all 8 dots? Note that the series of lines must be in a continuous movement without "lifting your pencil" (each new line starts where the previous line finishes).

Note: If your browser supports it, you may draw lines below with your mouse (keep the left mouse button pressed while drawing) or finger.