43. tia and trey want to study the effect of fertilizer on cherry tomato growth. they set up fifteen husky cherry plants in the
same pots with 500 ml of the same soil. they make 5 groups of three plants. group 1 gets no fertilizer and the other four
groups receive different amounts of fertilizer (1-4 teaspoons). each day the plants get 300 ml of water. after two months
they count the number of tomatoes that have turned red.
a. what is the independent variable? (1 pt)
b. what is the dependent variable? (1 pt)
c. name the control group (1 pt)
d. name two constants. (2 pts)
