When one is doubled, the other is doubled.
Distance and time taken for a journey are directly related. Doubling one doubles the other.
If the variables are inversely related, doubling one will half the other.
Dependent upon the variables, you need to take into consideration factors that can affect the outcome of the result; what will make the result vary in any way. If this, for example, entails the variable to be kept constant time, you will monitor the time and repeat it throughout the experiment. This is my understanding of constant variables; hope this helped.
In a controlled experiment, the Independent variable refers to the variable that is manipulated or altered. The dependent variable, meanwhile, is the result of the experiment.
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The other variable is doubled
If the variables are inversely related, doubling one will half the other.
In direct proportion to the variation.
When 100 of anything is doubled, the result is 200 of them.
The size of the United States nearly doubled
The Civil Right's Movement helped to restart the women's rights movement in the 1960s and 1970s. The number of women in the workforce doubled from 1950 to 2000 as a direct result of the women's rights movement.
coefficients that measure the efficiency of predation - for the prey, it is the proportion of encounters that result in the death of a prey individual; for the predator, it is the proportion of encounters that result in the death of a prey individual multiplied by the proportion of a new predator individual contributed by a prey individual.
... roughly doubled in size
The direct result of aerobic respiration is the production of ATP from the breakdown of glucose.
The number is 121/2.
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Beats are the direct result of the interference that is caused by the difference in frequencies of two sound waves.