If the height of a plant is (H(d)=15+3d) cm, what type of change is it?
Answer and explanation
Correct answer: Linear growth
In H(d)=15+3d, the coefficient of d is +3. For every one-unit increase in d, the plant’s height increases by 3 cm, so it represents linear growth. Linear decay would have a negative coefficient of d, such as 15-3d. Exam tip: in y=a+bx, b>0 indicates growth and b<0 indicates decay.
Frequently asked questions
What is the correct answer to this question?
Linear growth
Why is this the correct answer?
In H(d)=15+3d, the coefficient of d is +3. For every one-unit increase in d, the plant’s height increases by 3 cm, so it represents linear growth. Linear decay would have a negative coefficient of d, such as 15-3d. Exam tip: in y=a+bx, b>0 indicates growth and b<0 indicates 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.
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