Which one is correct tho?
2 answers:
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The graph is not given in the question and options are also not clear, so the required graph is attached below and the clear options are also given below:
Which statement is best supported by the data in the graph? A graph entitled Number of people living with H I V, number of people newly infected with H I V and number of AIDS deaths worldwide from 1990 to 2008 in millions is shown. Year is on the horizontal axis and number of people is on the vertical axis. The number of people living with H I V steadily increases over the years. The number of people newly infected increased from 1990 to 1996 and then began to decrease. The number of deaths due to AIDS increased from 1990 to 2002, and then began to level off and decrease.
A. Since 2000, there has been an increase in the number of people living with HIV, but a decrease in the number of people newly infected with HIV.
B. Since 1990, both the number of new HIV infections and the number of deaths due to AIDS has consistently increased
C. The life span of a person living with HIV has become shorter.
D. Twice as many people were living with HIV in 2008 than in 2000.
Answer:
A. Since 2000, there has been an increase in the number of people living with HIV, but a decrease in the number of people newly infected with HIV.
Explanation:
According to the data shown in the graph, since 2000, the people living with HIV has been increased, but a decrease in the number of people newly infected with HIV.
The reason behind this can be early screening of the infection since 2000 and awareness among people decreasing the infection rate as well.
Hence, the correct option is A.
Red and blue colored lights are most effective for plant growth.
Plant Growth is the dependent variable and light color is the independent variable. The rest are control variables.
A Control variable is the part of the experiment that we keep the same throughout all of the test subjects. An independent variable does not depend on other variables and a dependent variable does.
Allow me to explain. When we perform an experiment, many factors that can change the results, For this reason, it is common practice to keep many of them the same for all test subjects (In this case for all of the plants). This way we know that if changes are measured, they were not caused by these variables. These are what we call control variables.
An independent variable does not depend on other variables to remain the same. For example, the species of plant would be an independent variable, given that a plant cannot change its species because of other factors.
A dependent variable does change according to other variables and is often what we try to measure. For this example given, the dependent variable is how much the plant will grow with each colored light.
Knowing that plants rely on light to produce the energy needed to grow, we can <u>hypothesize</u> that applying different colors of light will have an effect on plant growth. To test this, we can create an experiment where we use:
- Soil
- amount of water
- amount of light
- species of plant
- length of experiment
As control variables.
One group of plants will have blue light, another green, and another red. We can identify the color of light as an independent variable.
Since what we seek to measure is plant growth, we identify this as our dependent variable and measure it for each plant after a set amount of time, to compare results.
With this, you can confidently identify the control, dependent, and independent variables and how to use them in your experiment.
To learn more about experiments try: brainly.com/question/17314369?referrer=searchResults
