A biology student wanted to determine if using fertilizer would promote plant growth. One hundred plants were
randomly assigned to one of two groups: one that used
the fertilizer, and one that did not use a fertilizer. Each
plant was planted in the same amount of soil and given
the same amount of water and light.

1.4

2.3

step-by-step explanation:

the formula for the constant of variation is

y= kx

divide each side by x

y/x =kx/x

y/x =k

we know a and y

1.   y/x = k

4/1 =4

check the other values to make sure they are the same

8/2 = 4   12/3 =4   and 16/4 =4  

the constant of variation is 4

2.   y/x = k

3/1 =3

check the other values to make sure they are the same

6/2 = 3   9/3 =3   and 12/4 =3  

the constant of variation is 3

there is no question content here, but you for the free points! : d

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answer: the correct answer is -32

step-by-step explanation: