Aresearcher wants to determine if preschool attendance is associated with high school graduation for low-income students. she randomly assigns low-income children to two groups; one group will attend preschool program, the second group will not attend preschool. the researcher plans to follow the children in the study for 20 years and observe whether or not they graduate from high school. which of the following is the explanatory variable in this study?
a. the length of time it takes a subject to graduate high school
b. the income status of the children
c. whether or not a subject attends preschool
d. whether or not a subject graduates high school

Option C) Whether or not a subject attends preschool

Step-by-step explanation:

We are given the following information in the question:

Students were divided into two groups, one group will attend preschool program, the second group will not attend preschool.

The researcher plans to observe whether or not they graduate from high school.

Explanatory Variable:

Thus, the explanatory variable in the above situation is

Option C) Whether or not a subject attends preschool

d. millimeters per hour.

step-by-step explanation:

we are given that,

carlo used a rain gauge to measure the amount of water his lawn is receiving from the sprinklers.

since, according to the options, we see that,

water cannot be measured by 'miles per hour', 'meters per second' and 'grams per seconds'.

we get that, the water can be measured by 'millimeters per hour'.

hence, the appropriate rate for describing the amount of water is 'millimeters per hour'.

answer: apothems is your answer

step-by-step explanation: hope u get it right