Welcome to Knitting Help!
Knit 5 rows and inc 4 sts across the 5th row. In stockinette stitch knit 2 rows. On row 3 increase one st at the beginning and one at the end of the row. Repeat this increase on every row (4,5,6,7,etc)until there are the given number of sts. Work one row without increases, work a row with increases and repeat these two rows until you have the given number of sts. You'll be increasing at the beginning and end of every other row at this point.