What is a dichotomous key? a tool that allows scientists to measure how much glucose is produced by plants

a tool that allows for the identification of an organism based on a series of paired statements that are based on characteristics

a tool that is used to predict the types of offspring produced when two plants are crossed

a tool that is used to measure the height of a plant

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

the monthly balance will be $75,000