If the amount of water is (W(t)=50-4t) litres, what type of change is it?
Answer and explanation
Correct answer: Linear decay
In W(t)=50-4t, the coefficient of t is -4. This means that the amount of water decreases by 4 litres for every unit increase in time. Since the rate of change is constant and negative, it represents linear decay. For a constant amount, the coefficient of t would be 0. Exam tip: in y=a+bt, b<0 indicates linear decay.
Frequently asked questions
What is the correct answer to this question?
Linear decay
Why is this the correct answer?
In W(t)=50-4t, the coefficient of t is -4. This means that the amount of water decreases by 4 litres for every unit increase in time. Since the rate of change is constant and negative, it represents linear decay. For a constant amount, the coefficient of t would be 0. Exam tip: in y=a+bt, b<0 indicates linear decay.
Which subject and chapter does this question cover?
This is a Class 9 Mathematics question. Chapter: Introduction to Polynomials. Topic: Linear growth and decay.
Student feedback
Was this question useful?
👍 0 Helpful 👎 0 Not helpful
Yes 0% No 0%
0 responsesStudent Reviews
No published reviews yet.
