Shown with a cast-on count of 5 stitches.  

• Row 1 (RS): K2, yo, k1, k2tog.
• Row 2: K2, kfb, k2 (6 sts).
• Row 3: K2, yo, k2, k2tog.
• Row 4: K3, kfb, k2 (7 sts).
• Row 5: K2, yo, k3, k2tog.
• Row 6: K4, kfb, k2 (8 sts).
• Row 7: K2, yo, k4, k2tog.
• Row 8: K5, kfb, k2 (9 sts).
• Row 9: K2, yo, k5, k2tog.
• Row 10: K6, kfb, k2 (10 sts).