Answer:
The constant here is the study outline
Explanation:
In scientific research, the constant variable is that part/variable of the experiment that does not change or is set not to change. Examples include temperature, environment or height.
Assuming the scenery described in this question is an experiment. All the groups presented are bound by a constant during the experiment. The constant here is the study outline. The study outline provided to the students is not going to change.
NOTE: There could be confusion as regards the answer being the final exam grade but that will be the dependent variable as that will be the outcome of the experiment while the time spent to study will be the independent variable.
Answer: 
Explanation:
Given
Again differentiate for the second derivative
The example of a subsystem and system relationship is option
A) mechanical toggle, Xbox controller
Explanation:
- Controls and Controllers are known as the mechanical, electro-mechanical, or electronic devices which are used to input signals to change the conditions or values which are in processes or access to buildings, operators, gated areas, etc.
- When you press and hold the given Shift button, these buttons which are chosen becomes an alternate inputs.
- Normally, there are three controllers(PID) which are used in any of the process industries inorder to maintain and control the required setpoint.
- an example of a subsystem and system relationship is a mechanical toggle, Xbox controller
- Controllers improve the steadiness and state of accuracy by decreasing the steady state error. When the steady state accuracy gets better, the stability also improves.
- Controllers are also used to help in reducing the unwanted offsets which are produced by the system.
