Can someone tell me if this is correct. A fishers biologist Collects data on the age and growth of flounder in Galveston bay, texas. Arrange the following data in a line graph; The age would be the x axis and growth is y axis.

Age. Growth
1 148
2 252
3 360
4 450
5 500
6 540

Ascience research group is testing a new type of plant food. one trial is conducted in a controlled experiment. the data from the trial show that the plant that received the new food grew faster than the control plant. the group announces that the new plant food makes plants grow faster. what is the main weakness in this scientific claim?