Question
John drained the water in his tub. The amount of water left in the tub (in liters) as a function of time (in minutes) is graphed.
Identify the input variable.
- Water
- Time
- Minutes
- Cannot say
Hint:
John drained the water in his tub. In that given graph we can look x-axis as a time and y-axis as a water. We need to focus on graph whether that is given that the find out the input variable of graph.
The correct answer is: Time
Here we need to find the which is the input variable
Firstly, in a graph x-axis which is also horizontal axis is the time of graph.
And , y-axis is which is vertical axis is the Amount of water at a time t minutes
And we know that along the x-axis change in time comes to change in water.
At first water is 360 liter,
After 5 minutes its completely drained.
So in time vs water , time is input variable . Because change in time cause the draining of water
The correct answer is time (option (b)).
The input variable are change or measured along the horizontal axis or x-axis and the output variable along the vertical axis or y-axis.
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