Question

Gregory is doing his experiment for the science

fair. The above table shows the data he collected.
Based on the table, what is the best description of
what Gregory wanted to know?

A) Which brand
and amount of fertilizer will work best?

B) Which
brand of fertilizer (A,B or C) works the best?

C)
Which amount of fertilizer will show the most
growth?

D) What level of fertilizer is the most that
can be given before growth decline?

Answer 1

A) Which brand and amount of fertilizer will work best?

Step-by-step explanation:

A) is the best answer because it takes into account all of the variables. The variables seem to be the amount of fertilizer, average plant growth, and brand of fertilizer. The independent variables are amount of fertilizer and fertilizer brand. The dependent variable is the plant growth.

B) is not the best answer because it does not include the amount of fertilizer. Because this variable is changing, it is important to consider.

C) is not the best answer because it does not take the type of fertilizer into account. If the researcher were only concerned with how the amount of fertilizer affects plant growth, it would not be necessary to include 3 different types of fertilizer.

D) is not the best answer because this doesn't explain why the researcher used different types of fertilizer.