Read This! When designing an experiment, you need to consider three types of variables. The independent variable is changed by the experimenter in the design of the experiment. This variable is sometimes called the
"manipulated variable." The dependent variable is what changes as a result of the change in the inde-
pendent variable. This variable is sometimes called the responding variable." In some cases more than
one dependent variable is considered. The third category of variables is controlled variables. These are variables that you think may change the outcome of the experiment, but since they are not being studied,
they need to be kept constant in each trial.

(QUESTION)
9. Identify the independent, dependent, and controlled variables for the experiment that produced
the data in Model 3

Independent:

Dependent:

Controlled:

americans began to notice growing differences between the northern and southern sections of the country. there were more people living in cities in the north, which made it more urban. more people lived on farms in the south, which made it more rural. while many people were farmers in the northern states, there were now other ways to make a living, such as working in mechanical cotton gins factories manufacturing cloth, tools and other goods. people in the north supported high tariffs on goods imported from europe because the extra cost encouraged people to “buy american” instead. in the southern states, planters did not like tariffs because they sold most of their production to europe and bought their tools from there as well. southerners believed the protective tariff was something that only northern factory owners keep their profits high. so the southern politicians came up with an idea. they would opt out. they would simply ignore the protective tariff. it was ‘null and void’ in south carolina. the state would not collect the taxes on goods imported into south carolina, no matter what the president said they had to do. this decision led to the nullification crisis.

dude i stopped reading after the first 7 words but hey you seem real smart thats awesome have a great day