sanafarghal
29.10.2020 •
Mathematics
You are conducting an experiment to evaluate how the number of hours spent exercising each week affects blood pressure. What is the independent variable in this experiment
Solved
Show answers
More tips
Answers on questions: Mathematics
- M Mathematics Rewrite y = 2x^2 – 8x + 4 in vertex form. Please help!!...
- M Mathematics For approximately what period of time does the Moon stay in the sky a week after the full-moon day? A) 12 hours after sunset B) 12 hours after midday C) 12 hours...
- M Mathematics A tabela abaixo se refere as vendas de carros de uma concessionaria no ano de 2019 ,por trimestre .Na hora de analisar os números ,Joaquim percebeu q faltava a fração...
- M Mathematics A point M on a segment with endpoints X (1, −2) and Y (10, 3) partitions the segment in a 5:1 ratio. Find M....
- M Mathematics What is the factor of this problem? ~plz help cannot get this wrong !...
- M Mathematics X=y-4 7x-2y=17 solve the system...
Ответ:
The question is incomplete, below is the complete question
You are conducting an experiment to evaluate how the number of hours spent exercising each week affects blood pressure. What is the independent variable in this experiment?
The intensity of the exercise.
The amount of exercise each week.
Blood Pressure
The type of exercise.
The amount of exercise each week.
Step-by-step explanation:
The two major kinds of variables in a scientific experiment are the independent and dependent variables.
The independent variable is the variable whose values are completely under the complete manipulation of the experimenter. The experimenter decides what value to assign to the variables in this category and the effect of the manipulation of the independent variable determines the outcome variable. In this example, the amount of exercise each week, which is determined by the number of hours exercised each week is subject to the experimenter, hence it is the independent variable
The dependent or outcome variable is the variable whose values depend on the effect of the manipulation of the independent variable. This variable is not directly subject to the manipulation of the experimenter. In this example, the blood pressure gotten after the exercise is the outcome variable.
Ответ:
Option B.
Step-by-step explanation:
If two lines are parallel then their slopes are always same.
Following this rule we can find the slope by the given pairs of coordinates of the options.
If the slope of the line is same as the slope of y axis then the line passing through these points will be parallel to the y axis.
Slope of y - axis = ∞
Option A). Slope =
=
=
= 775
Therefore, line passing through points (3.2, 8.5) and (3.22, 24) is not parallel to y axis.
Option B). Slope of the line passing through
and 
will be
=
= ∞
Therefore, line passing though these points is parallel to the y axis.
Option C). Slope of the line passing through
and (7.2, 5.4)
=
= 0
Therefore, slope of this line is not equal to the slope of y axis.
Option B. is the answer.