Which type of study best describes the following research most likely to be done?

a teacher wants to know how fast all her students for a particular period can complete a multiplication quiz to check their mental math abilities. so, all of her students are tested on a computer and the time of each and every student is recorded.

group of answer choices

experimental study

observational study

simulation study

census

sampling

In this case the Teacher is carrying out an experimental estudy.

Step-by-step explanation:

In this case, the Teacher is carrying out an experimental study. Because three things make it an experiment. First, the teacher puts the test to all of her students. Without sampling or choosing a representational population. She controls the conditions the students undergo and she also hey are recorded. So her manipulation of the environment separates it from observation. Also, she practices the study in all of them so there is no simulation all data is real. Thus, an Experimental study is a correct answer. She runs tests o all of them without asking any question discarding census.

the system of inequity is

step-by-step explanation:

from the given graph it is noticed that we have two related lines. one is solid and another is dashed.

if a line passing through two points, then the equation of line is

the solid line passing through the points (0,4) and (4,0).

the related equation of solid line is .

similarly, find the related equation of dashed line. the dashed liune passing through the points (0,0) and (3,1).

the related equation of dashed line is

from the given graph it is noticed that the point (0,1) lies on the shaded region, therefore the point (0,1) must be satisfied by the related equations.

check the related equations by the point (0,1).

this statement is true if the sign of inequality is < instead of equality. since it is an solid line therefore the sign of inequality will be . the required inequality is

similarly, check the second related equation.

it is a dashed line, so this statement is true if the sign of inequality is > . the required inequality is