The total height of tomato plant which was planted by Simon at two, three, four, and five weeks respectively were 13, 16, 19, and 22 inches tall.
Increase in height from second to third week =16-13=3 inches
Increase in height from third to fourth week =19-16= 3 inches
Increase in height from fifth week to fourth week = 22-19=3 inches.
The tomato plant is increasing 3 inches every week.
Height of tomato plant in first week =13-3=10 inches
Height of tomato plant in zero week or when it was planted = 10-3=7 inches.
The tomato plant Simon planted was 7 inches tall when it was planted.