Question
A bug repellent was sprayed on one arm. On the other arm, the bug repellent was not sprayed. After 2 hours, the number of bug bites is recorded. Identify the independent variable.
- The type of bug repellent
- If an arm was sprayed with bug repellent or not
- The number of bug bites
- The color of the bugs
Hint:
In a given equation, the 2 variables viz. x & y can be bifurcated into Independent variable and dependent variable.
The independent variable can be referred to as the cause i.e. Its value is independent (does not change as per the other variables) of other variables. The dependent variable can be referred to as the effect. Its value depends on changes in the independent variable.
Generally, Independent variables are represented on the x-axis i.e. horizontal axis and Dependent variables are represented on the y-axis i.e. verticle axis.
The correct answer is: If an arm was sprayed with bug repellent or not
GIVEN-
Bug repellent is sprayed on one arm while it is not sprayed on the other.
Number of bug bites on each arm is recorded after 2 hours.
TO FIND-
Independent variable in the given scenario.
SOLUTION-
In the given scenario, we observe that the number of bug bites on each arm is recorded at the end of 2 hours.
We know that spraying bug repellent is a given criteria. i.e. it is the pre condition that is to be fulfilled at the beginning.
However, the number of bug bites on both the arms will depend on whether or not the bug repellent is sprayed on the respective arm.
Hence, "The number of hours of sleep they had" is the Independent variable in this situation.
FINAL ANSWER-
Option 'b' i.e. 'If an arm was sprayed with bug repellent or not' is the correct answer to the given question.
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